skip navigation
print icon Print


by Environmental Topic

Check box(es) to view articles associated with topic.

Tooltip= Why this environmental topic is important to Operations

Active Transportation

Active Transportation topic describes a range of programs, policies, case studies and other resources related to the role of transportation in support of livable and sustainable communities, including multimodal transportation options that advance public health goals. Ensuring efficient operations can help reduce air emissions and sustainable outcomes for projects.

Active Transportation
Air Quality

Ensuring effective operations of transportation systems is a key strategy in reducing air pollution emissions. Operational elements such as signal timing or placement, turn lanes, and roundabouts can improve traffic flow and reduce emissions.

Air Quality
Climate Change Mitigation/Adaptation

Climate Change Mitigation/Adaptation covers two complex, and distinct sub-topics: Energy/Greenhouse Gas Emissions and Infrastructure Resilience.

Climate Change Mitigation/Adaptation
Cultural Resources

Transportation agencies must address historic preservation and cultural resource issues during the transportation project planning and development processes under Section 106 of the National Historic Preservation Act and Section 4(f) of the Department of Transportation Act. This includes potential impacts of transportation operations activities.

Cultural Resources
Emerging Technologies

Emerging Technologies
Energy/Greenhouse Gas Emissions

Ensuring effective operations of transportation systems is a key strategy in reducing greenhouse gas emissions. Operational elements such as signal timing or placement, turn lanes, and roundabouts can improve traffic flow and reduce emissions. Extreme weather events and changing climate conditions also pose increased risks that may require changes in operational practices.

Energy/Greenhouse Gas Emissions
Infrastructure Resilience

Building resilience to extreme weather and changing climate conditions is vital to ensuring efficient operations of transportation facilities and systems. Operational strategies also are key in responding to extreme climate conditions.

Infrastructure Resilience
Context Sensitive Solutions

Context Sensitive Solutions is a collaborative, interdisciplinary, holistic approach to the development of transportation projects. It involves careful consideration of community values, environmental features, land use, transportation function and available budget. CSS can be incorporated into all phases of program delivery including operations.

Context Sensitive Solutions
Environmental Justice

Title VI of the Civil Rights Act and environmental justice principles apply to all U.S. DOT programs, policies, and activities. Evaluation of human impacts should be given continuous attention throughout planning, project development, implementation, operation, construction, and maintenance to identify and avoid, minimize, and/or mitigate disproportionately high or adverse effects on low income and/or minority communities.

Environmental Justice
Environmental Management Systems

An environmental management system is the organizational structure and associated processes for integrating environmental considerations into the decision-making processes and operations of an organization. An EMS can help ensure environmental considerations are taken into account in operational practices.

Environmental Management Systems
Geographic Information Systems

Transportation agencies use GIS from the early inception of projects through planning, design, construction, maintenance, and operation of transportation networks.

Geographic Information Systems
Invasive Species/Vegetation Management

Transportation agencies are increasingly linking transportation and conservation by adopting best management practices, including roadside vegetation management plans, to avoid spread of invasive species through transportation operations.

Invasive Species/Vegetation Management
NEPA Process

Transportation operations is among the many elements that must be considered when evaluating potential project impacts under NEPA.

NEPA Process

FHWA requires consideration of mitigation for highway traffic noise in the planning and design of Federally aided highways. These regulations establish standards for abating highway traffic noise during operations of transportation systems.

Planning & Environment Linkages

Streamlined project delivery can be achieved through efforts to link transportation planning and the NEPA process. Agencies can benefit by incorporating environmental and community values into transportation decisions early in planning and carrying these considerations through project development, project delivery, and operations.

Planning & Environment Linkages

Sustainability refers to taking into account social, environmental and economic considerations in transportation. These principles are important in all aspects of transportation, including long-range planning and can then be carried through to short-range planning and program/project development, and operations.

Transportation Reauthorization

This topic covers project delivery and environmental provisions of both the FAST Act and the MAP-21 surface transportation funding and policy legislation. The legislation may affect all aspects of transportation projects including planning, design, construction, and maintenance. It includes language on linking planning and NEPA processes.

Transportation Reauthorization
Waste Management/Recycling/Brownfields

Transportation activities, from project planning and development through operations and maintenance, are affected by a variety of requirements and initiatives related to the management, disposal, and recycling of wastes.

Waste Management/Recycling/Brownfields
Water Quality/Wetlands

Protecting water quality is an ongoing environmental concern for transportation agencies, including requirements for stormwater runoff and mitigation or avoidance of impacts to wetlands and water resources. Operational considerations can play a role in effectively mitigating impacts to wetlands and managing stormwater runoff.

Water Quality/Wetlands


Active Transportation

Recent Developments: AASHTO, Adventure Cycling Formalize Partnership on National Bike Route System

The American Association of State Highway and Transportation Officials and the Adventure Cycling Association signed a Memorandum of Understanding (MOU) on Feb. 23 formalizing their 16-year partnership to expand the U.S. Bicycle Route System (USBRS) for a seamless travel experience across the United States. The MOU is the next step in an ongoing partnership between AASHTO and the Adventure Cycling Association that began in 2005. Through active engagement with AASHTO and its member state departments of transportation, the USBRS is approaching the 15,000-mile mark in 31 states and the District of Columbia. The end goal of the USBRS is a 50,000-mile network of routes spread out across the country. For more information, link to the MOU and the announcement. (2-23-21)

[back to top]

Recent Developments: Group Offers Design Strategies for Safe Routes to School

The Safe Routes Partnership has developed an engineering guide that provides design strategies to address traffic safety concerns commonly identified in school areas and along the routes to school. The guide provides guidance on designing streets, sidewalks, and paths that reduce or eliminate unsafe behaviors and conflicts between drivers and people walking or biking. It features 17 fact sheets including estimated costs, safety considerations, safety outcomes and opportunities for public art in routes to school. The group also issued a separate guide for public engagement in designing safe routes to school. For more information, link to the engineering solutions guide. (3-23-21)

[back to top]

Recent Developments: FTA Announces Funding for Low- or No-Emission Transit Vehicles

The Federal Transit Administration has announced $180 million in funding under the FTA's Low or No Emission (Low-No) Grant Program. The program helps eligible project sponsors finance low- or no-emission vehicles and supports facilities that use advanced technologies to provide cleaner, more energy efficient transit operations. The funding will prioritize applications with an environmental justice component as well as those that will support workforce development. For more information, link to the announcement. (2-11-20)

[back to top]

Recent Developments: Connecticut DOT Releases Pedestrian Safety Strategy

The Connecticut Department of Transportation has released a comprehensive pedestrian safety strategy, aimed at reducing an increase in fatalities and injuries. The agency has recommended a four-pronged approach that addresses the following: 1) speed: to reduce and better manage traffic speeds in areas with significant pedestrian activity; 2) crosswalks, intersections and streets: to implement safer roadway design; 3) public awareness, education and training: to increase awareness of the problem and promote safer, less risky behaviors; and 4) an integrated safety program: to align policies and programs that strengthen the state’s roadway safety program for motorist and non-motorists. For more information, link to the strategy. (1-26-21)

[back to top]

Recent Developments: Kansas DOT Launches First Active Transportation Plan

The Kansas Department of Transportation is seeking input from the public to use in developing its first statewide active transportation plan (ATP). The Kansas ATP will focus on how active transportation can be improved through better policies, planning, design and partnerships with other state agencies and local communities. For more information, link to the announcement. (12-15-20)

[back to top]

Recent Developments: Bicyclist Group Honors 51 Bicycle Friendly Communities

The League of American Bicyclists has designated 51 additional places with a Bicycle Friendly Community (BFC) award. The 51 communities join a total of 485 that have received the designation. The award honors communities where people of all ages and abilities have access to safe street networks and a local culture is fostered that encourages bicycling for everyone. For more information, link to the announcement. (12-16-20)

[back to top]

Recent Developments: APTA Releases Dashboard of Transit Ridership Trends

A resource providing up-to-date estimations of public transit ridership for agencies across the U.S. has been developed by the American Public Transportation Association (APTA) and the Transit app. During the COVID-19 pandemic, public transit ridership has risen and fallen rapidly. The app tracks demand for public transit and publishes estimates of ridership change in real time. The dashboard is available at For more information, link to the announcement. (12-8-20)

[back to top]

Recent Developments: First-Ever Pedestrian Safety Action Plan Issued by FHWA, NHTSA

The nation’s first-ever Pedestrian Safety Action Plan has been issued by the Federal Highway Administration and National Highway Traffic Safety Administration. The plan emphasizes improvements to the roadway and surrounding environment, increased education on the shared responsibility of both pedestrians and motorists, and enforcement and adjudication of pedestrian safety laws. It will promote the expanded use of countermeasures, technology, and data-driven practices to address pedestrian fatalities and injuries. For more information, link to the Pedestrian Safety Summit website and to the plan. (11-24-20)

[back to top]

Recent Developments: Guidebook to Help Communities Improve Transportation to Health Care Services

A guidebook and plan for improving transportation for health care related services has been issued under the Transit Cooperative Research Program (TCRP Research Report 223). The report details how to initiate a dialogue between transportation and health care providers as well as strategies for implementing transportation solutions appropriate for patients. For more information, link to the pre-publication draft. (10-30-20)

[back to top]

Recent Developments: Forest Service Proposes Guidance on E-Bike Use

Draft guidance on management and use of electronic bicycles (e-bikes) on national forests and grasslands has been issued by the U.S. Forest Service (USFS). The service is seeking public input on guidance to expand e-bike access while protecting natural resources and other forest uses. The proposed guidance would categorize e-bikes by class and allow for more precise designation of trails for e-bike use to limit potential impacts on resources. For more information, link to the notice. (9-24-20)

[back to top]

Recent Developments: Bicycle Friendly Businesses Recognized

The League of American Bicyclists has recognized13 organizations with Bicycle Friendly Business Awards. The program recognizes organizations that have taken steps to make biking an easy option for employees or customers. The nearly 1,400 total Bicycle Friendly Businesses nationwide include government agencies, Fortune 500 companies, airports, schools, restaurants, and other employers. For more information, link to the announcement. (9-17-20)

[back to top]

Recent Developments: Public Transportation Industry Pledges Commitment to Passenger Health, Safety

The U.S. public transportation industry has issued a pledge to passengers that public transit systems are taking all the necessary measures to operate safely as the nation recovers from the COVID-19 pandemic. Measures include following public health guidelines, cleaning and disinfecting, and keeping passengers informed. As of the Sept. 9 launch, over 100 public transit systems had signed on to the American Public Transportation Association’s Health and Safety Commitments Program. For more information, link to the announcement. (9-9-20)

[back to top]

Recent Developments: Washington State DOT Launches ‘Safe, Healthy and Active Streets’ Program

Washington State has launched a program that will allow temporary lane reallocations on some state roadways to increase active transportation and allow for physical distancing. The Safe, Healthy and Active Streets Program aims to increase space for people walking or biking, or create outdoor seating for restaurants and sales areas for retailers, while maintaining physical distance to help reduce exposure to the coronavirus. Eligible locations must meet certain criteria, including being located in population centers with demonstrated lack of space for active transportation, having speed limits of 35 mph or less, and meeting state safety standards. For more information, link to the blog post and program announcement. (7-24-20)

[back to top]

Recent Developments: MassDOT Provides Funding for Shared Streets and Spaces Program

The Massachusetts Department of Transportation (MassDOT) has announced the award of over $1 million in funding to 12 communities under the state’s recently announced Shared Streets & Spaces Program. The program provides technical and funding assistance to help Massachusetts cities and towns conceive, design and implement changes to curbs, streets, and parking facilities in support of public health, safe mobility, and renewed commerce. Under the award, 75% of the funding is being provided to environmental justice communities. Grants will continue to be awarded on a rolling basis for projects that can be implemented and used this summer and fall. MassDOT has allocated a total of $5 million for this 100-day program. For more information, link to the announcement. (7-17-20)

[back to top]

Recent Developments: Caltrans Adopts Plan to Increase Walking, Biking

The California Department of Transportation (Caltrans) has adopted a plan to increase bicycling and walking across the state. A key effort in the action plan is to identify bicycle and pedestrian-focused needs at the community level in each region of the state through Caltrans District Active Transportation Plans. Adding more dedicated bike lanes and walking paths is considered crucial to reducing the number of deaths on state roads. The agency said the plan will reduce dependence on driving, promote safety, and emphasize social equity by reconnecting communities that have been divided by freeways and high-speed roads. For more information, link to the announcement. (7-6-20)

[back to top]

Recent Developments: ITE Webinar Will Highlight E-Scooter Safety

A webinar on e-scooter safety will be held by the Institute for Transportation Engineers (ITE) on July 7. The webinar will share emerging policies and practices of e-scooter safety under MaaS/MOD and Vision Zero programs in cities. It will feature speakers from three communities where e-scooters are in use to present their agency's background, information, and experiences on Vision Zero and e-scooters in Atlanta, Georgia; Austin, Texas; and Washington, D.C. (6-25-20)

[back to top]

Recent Developments: Survey Looks at COVID-19 Impacts on Trails Industry

Significant impacts on the nation’s trails industry has been seen in the wake of the COVID-19 epidemic, according to a survey by American Trails. The report found the total value of contracts lost: $13.8 million +; total volunteer hours lost: 383,000+; and total projects or events cancelled or postponed: 3,865+. The group issued a report including insights on how trails can be improved and how they can contribute to pandemic recovery efforts. For more information, link to the summary. (5-20-20)

[back to top]

Recent Developments: FTA Shares Information on Coronavirus Funding

The Federal Transit Administration will host will host a webinar April 6, 2020, at 1 p.m. ET to provide information about FTA’s implementation of the Coronavirus Aid, Relief, and Economic Security (CARES) Act of 2020. Join FTA leadership and program staff will discuss funding amounts, eligible expenses and other funding features. Other webinar sessions also will be scheduled. The CARES Act was signed into law to provide economic support for a variety of industries affected by the global Coronavirus pandemic, including the transit industry. The CARES Act is a historic bipartisan law that provides $25 billion in funding to support the transit industry’s response to the pandemic. Link to FTA’s Coronavirus page. (4-3-20)

[back to top]

Recent Developments: Study Offers Guidance on Safe Intersections for Bikes, Pedestrians

Guidance on improving the safety of intersections for bicyclists and pedestrians is provided in a report from the National Cooperative Highway Research Program. The report provides a process to help analyze intersection safety and select appropriate countermeasures. It focuses on countermeasures that address the top five crash types for pedestrians and the top seven crash types for bicyclists. For more information, link to the report. (5-11-20)

[back to top]

Recent Developments: FHWA Posts Resources on Safe Pedestrian Transportation

Resources related to the Federal Highway Administration’s Safe Transportation for Every Pedestrian (STEP) program are now available. As part of its Every Day Counts initiative, FHWA has posted guidance, "tech sheets" on countermeasures such as hybrid beacons and raised crosswalks. In addition, a series of case studies highlight practices from around the country. For more information, link here. (5-7-20)

[back to top]

Recent Developments: FHWA Issues Brochure Series on Benefits of Transportation

The Federal Highway Administration has created six outreach brochures to help with communicating how various transportation projects and programs positively impact health and the local economy. The brochures outline the economic and social benefits of active transportation, complete streets, interagency cooperation, public transportation, and rural and small town transportation. The series, titled “Transportation – Making Connections,” is part of broader initiatives to link transportation to healthy communities. For more information, link to the brochures. (3-17-20)

[back to top]

Recent Developments: FTA Makes $130 Million Available for Low or No Emission Transit Buses

The Federal Transit Administration has announced the availability of $130 million in fiscal year 2020 competitive grants under the agency’s Low or No Emission Bus program. The funding would allow recipients to purchase new transit buses that use clean fuel or are powered by alternative fuels such as electricity. The funding also could be used for acquiring, installing, or constructing equipment or facilities related to the low or no emission buses. In fiscal year 2019, the program received applications for 157 projects, and 38 projects were funded at a total of $84.95 million. For more information, link to the notice of funding opportunity. (1-24-20)

[back to top]

Recent Developments: CDC Announces ‘Active People, Healthy Nation’ Initiative

The Centers for Disease Control and Prevention has launched an initiative to encourage physical activity. The “Active People, Healthy Nation” initiative is a toolkit for state and local governments and a public information campaign to inform people about the benefits of an active lifestyle. The initiative includes, among other things, information on creating activity-friendly routes to everyday destinations through such state and local efforts as Complete Streets policies, zoning policies, local government master plans, and Safe Routes to Schools. The CDC will monitor the nation’s physical activity levels through the National Health Interview Survey and the Youth Risk Behavior Survey. The initiative is based on the Department of Health and Human Services’ Physical Activity Guidelines for Americans. For more information, link to the Active People, Healthy Nation website. (1-16-20)

[back to top]

Recent Developments: Safe Routes to School Programs 2019 Census Issued

An overview of Safe Routes to School programming in the United States has been issued by the Safe Routes Partnership. The report includes a high-level assessment of challenges, innovations, and opportunities for Safe Routes to School programs. The findings are based on a national survey conducted in 2019 that looked at policies, practices, and funding for programmatic activities. For more information, link to the report. (1-6-20)

[back to top]

Recent Developments: New Rail-Trail Segments Announced in Four States

Rails-to-Trails Conservancy has announced that nearly $13 million in funding has been secured for segments of the Great American Rail-Trail. This investment will help to close trail gaps and to improve existing sections of trail along the 3,700-mile route, which currently stands at 52% complete. The funding will go to trail segments in Indiana, Iowa, Ohio, and Washington. Nearly 100 miles of new trail along the route are expected to be completed in 2020. For more information, link to the announcement. (12-23-19)

[back to top]

Recent Developments: Group Issues Policy Statement on Facilitating Scooter, Bike Share Systems

The Association of Pedestrian and Bicycle Professionals has issued a policy statement concerning bike share, shared electric scooters, shared electric bicycles, and other forms of shared micromobility systems. The group views these systems as a valuable part of a comprehensive transportation system that encourages active transportation and reduces automobile use. The policy statement presents key factors, principles, and recommendations that can help with the smooth introduction of micromobility systems in cities and campus environments. The policy statement also says that cities should facilitate the arrival of micromobility systems as best as possible with suitable rules and regulations that will limit uncertainty and negative public opinion. For more information, link to the policy statement. (12-23-19)

[back to top]

Recent Developments: NCHRP Issues Roadmap of Priorities for Mobility, Health Research

Research priorities regarding the integration of public health and transportation topics that could be pursued in the next decade have been set out in a report issued under the National Cooperative Highway Research Program. The document, NCHRP 20-112: A Research Roadmap for Transportation and Public Health, includes write-ups of six research problem statements that can be presented to key committees of the Transportation Research Board or the American Association of State Highway and Transportation Officials as a way to initiate research and begin filling in knowledge gaps. The roadmap identifies ways in which health considerations can be better integrated into transportation policymaking, planning, project development, and program monitoring and evaluation. For more information, see NCHRP 20-112: A Research Roadmap for Transportation and Public Health. (12-16-19)

[back to top]

Recent Developments: Cities Urged to Include E-Bikes/Scooters in Transportation Networks

Analysis and recommendations for cities to link e-bikes and e-scooters to sustainable transport goals are provided in a report from the Institute for Transportation and Development Policy. The Electric Assist: Leveraging E-bikes and E-scooters for More Livable Cities analyzes potential opportunities and risks posed by e-bikes and e-scooters and provides recommendations to encourage use of these modes. For more information, link to the report. (12-9-19)

[back to top]

Recent Developments: Sidewalk Navigation Tool Development Subject of IDEA Report

The development of a pathway navigation web application that would provide information on sidewalk conditions, route quality, and user preferences, especially for wheelchair users and the visually impaired, is the topic of a report from the Transportation Research Board. The report, issued under the Innovations Deserving Exploratory Analysis Program (Transit IDEA Project 87), outlines the development of pathNav using data collected by through a smart phone app and a hand-operated device that maps sidewalks using an accelerometer, inclinometer, laser, camera, and GPS transponder. The pathNav tool will implement a route accessibility index that considers the quality of the pathway as determined by data collected. A web interface will be built allowing users to search for the most accessible routes. The report includes display mockups and software architecture. For more information, link to the report. (11-8-19)

[back to top]

Recent Developments: New York City Tops List of Metro Areas for Bicycle Commuters

The University of Minnesota Center for Transportation Studies has issued a report that ranks the 50 largest (by population) metropolitan areas in the United States on how well people can travel to their jobs using a bicycle. New York tops of list of cities that provide easy or moderately easy bicycle commutes, as determined using a scale of one to four, with one being a stress-free route and four being no bike-specific infrastructure at all. The top five include San Francisco, Chicago, and Denver, with Philadelphia and Washington, D.C. splitting the fifth spot. The report presents detailed accessibility values for each metropolitan area as well as block-level maps that illustrate the spatial patterns of accessibility within each area. It also includes a map at the census tract level that shows accessibility patterns at a national scale. For more information, link to the report. (July 2019)

[back to top]

Recent Developments: Report Reviews Transit Agency Partnerships With Ride-Hailing Companies

A review of partnerships between transit agencies and transportation network companies has been issued under the Transit Cooperative Research Program. TCRP Research Report 204 reviews both active and inactive partnership arrangements and finds that the most common partnership arrangement involves the transit agency directly subsidizing ride-hailing trips. The report also finds that transit agencies seek partnerships with transportation network companies to provide a specific type of service, to respond to a specific challenge, or to demonstrate innovation. The most common target audiences are users of paratransit or who have difficulty with the first mile/last mile connections to transit. The findings include a Partnership Playbook to help transit agencies make informed decisions. For more information, link to the report. (9-25-19)

[back to top]

Recent Developments: NACTO Provides Best Practices, Policies for Shared Bikes and Scooters

The National Association of City Transportation Officials (NACTO) has issued revised guidelines that provides best practice recommendations and a survey of the current state of practice for managing and regulating shared bikes and scooters. The guidelines present best practices, including requirements for fleet size, fleet removal or relocation, fleet rebalancing for docked systems, equipment maintenance, customer service, pricing equity, and operator labor and employment standards. The guidelines also discuss policies for public engagement and data sharing. In addition, the guidelines have comparative charts of the current state of practice in multiple cities nationwide. For more information, link to the guidelines. (9-11-19)

[back to top]

Recent Developments: FTA Announces Grants for Low- or No-Emission Buses

The Federal Transit Administration has announced $84.9 million in grant funding for advanced-technology transit buses and infrastructure under the Low- or No-Emission grant program. The grants will go to 38 projects powered by technologies including fuel cells, battery electric engines, and related infrastructure investments such as charging stations. For more information and a list of projects, link to the announcement. (7-26-19)

[back to top]

Recent Developments: Researchers Explore Potential for Incentivizing E-Bikes

White papers published by the Transportation Research and Education Center at Portland State University explore the potential for incentivizing electric bicycles as a means to reduce greenhouse gas emissions. The papers address the effects of e-bikes on person miles traveled and how incentives can be used to expand the market for such vehicles. Future research will focus on modeling travel behavior and sustainability impacts of e-bike use. For more information, link here. (5-23-19)

[back to top]

Recent Developments: Report Reviews Transit Agency Partnerships With Ride-hailing Companies

A review of partnerships between transit agencies and transportation network companies has been issued under the Transit Cooperative Research Program. TCRP Research Report 204 reviews both active and inactive partnership arrangements and finds that the most common partnership arrangement involves the transit agency directly subsidizing ride-hailing trips. The report also finds that transit agencies seek partnerships with transportation network companies to provide a specific type of service, to respond to a specific challenge, or to demonstrate innovation. The most common target audiences are users of paratransit or who have difficulty with the first mile/last mile connections to transit. The findings are intended to assist transit agencies in making partnership decisions. For more information, link to the report. (4-9-19)

[back to top]

Recent Developments: Environmental Effects of Ride-hailing, Other Travel Modes Reviewed in Report

The environmental impacts of various modality choices and the frequency of ride-hailing use among drivers are explored in a report from the National Center for Sustainable Transportation. The report focuses on vehicle miles traveled, energy consumption, and the greenhouse gas (GHG) emissions from transportation of various groups of travelers. It identifies four classes based on survey respondents’ reported use of various travel modes: drivers, active travelers, transit riders, and car passengers. The report also reviews the frequency with which travelers use ride-hailing services, also called transportation network companies, finding that the total environmental impacts account for a relatively small percentage of total GHG from transportation. For more information, link to the report. (January 2019)

[back to top]

Recent Developments: Regulation of Ride-Hailing Services Subject of New Report

The Institute for Transportation and Development Policy has issued a report discussing the challenges cities face by transportation network companies (TNCs) such as Uber and Lyft worldwide. The report presents a framework for regulating TNCs to maximize benefits such as adding connectivity to transit as well as reducing the need for car ownership while also mitigating potential problems with use of TNCs. The report says that cities should consider the role TNCs fill in their areas and establish ways to measure the impacts on congestion, safety, emissions, and equitable access. The report includes four case studies and a companion webinar recording. For more information, link to the announcement. (3-21-19)

[back to top]

Recent Developments: Study Urges Improving Corridors to Promote Healthy Communities

A study of commercial arterials across the U.S. recommends actions and practices to make corridors safer and promote healthy communities. The study, Blind Spots: How Unhealthy Corridors Harm Communities and How to Fix Them, by the Urban Land Institute and Smart Growth America, included an audit of 6,925 urban and suburban commercial arterials from 100 of the most populous U.S. metropolitan areas. Using a range of indicators, the study found many primary arterials tend to be dangerous, have high instances of traffic deaths, and cost communities in terms of safety, economic productivity, and transportation efficiency. The study recommends a range of land use and transportation policies and practices to improve the health of the nation’s corridors. For more information, link to the report. (2-20-19)

[back to top]

Recent Developments: FTA Reports on Grant Program for Access to Health Care Solutions

The Federal Transit Administration has issued a report to Congress on its Pilot Program for Innovative Coordinated Access and Mobility Grants. The pilot program is intended to find and test promising, replicable public transportation solutions that increase access to health care, improve health outcomes; and reduce health care costs. For more information, link to the report. (December 2018)

[back to top]

Recent Developments: AASHTO to Host a Webinar on Recent Bicycle, Pedestrian Plans

AASHTO’s Council on Active Transportation will hold a webinar Jan. 29 on recent innovations in bicycle and pedestrian projects and planning in Massachusetts and North Dakota. The webinar will include discussion of MassDOT’s newly released statewide bicycle and pedestrian plans and guidance documents, as well as North Dakota DOT’s statewide plan for active and public transportation and related demonstration projects. Register for the webinar by clicking here.

[back to top]

Recent Developments: Guide Issued for Growing a Safe Routes to School Program

The Safe Routes to School National Partnership has issued a new guide on ways to for create a local safe routes to school program. The guide provides an overview of how the programs work and why they matter. It also provides insight on the stages of establishing a system and the essential components—including action plans and policies—for creating a sustainable program. The guide is accompanied by several sample documents that can be used to establish a program. For more information, link to the guide. (1-8-19)

[back to top]

Case Studies: Connecticut - Connecticut DOT Helps Towns Accommodate Walking and Bicycling through Road Safety Audits


An effective way to address obstacles to bicycle and pedestrian accommodation is to go out and look for them. That was the lesson the Connecticut Department of Transportation (CTDOT) learned in implementing its Community Connectivity Program.

The Community Connectivity Program helped towns such as Portland, Ct., identify needed improvements. Photo: CTDOT

The program was developed as part of Gov. Dannel Malloy’s Let’sGoCT! transportation initiative. Launched in 2015, the initiative set forth an ambitious 30-year vision for the state, calling for “a best-in-class transportation system” to be achieved by supporting statewide, corridor, and local projects across all transportation modes.

A key element of the initiative was to support sustainable communities, including a program to promote pedestrian- and bicycle-friendly urban centers. CTDOT officials decided to take the concept one step further, incorporating rural areas as well.

The initiative supports streamlined project delivery by helping to identify and build community support for needed intermodal connections. The aim of the Community Connectivity program was to improve conditions for walking and bicycling in community centers – defined as places where community members meet for social, educational, employment, or recreational activities. It was intended to support intermodal connections with a focus on bicycle and pedestrian safety, including transit “last mile” connectivity and better, safer access to employers, business districts, and residential areas.

Colleen Kissane, Transportation Assistant Planning Director in CTDOT’s Bureau of Policy and Planning, leads the Community Connectivity Program. Kissane said officials decided to follow the lead of a successful pilot road safety audit funded by the Federal Highway Administration (FHWA) in 2015. CTDOT would lead by example, working with towns and cities to conduct their own road safety audits at important bicycle and pedestrian corridors and intersections across the state.

CTDOT reached out to all 169 municipalities, offering to conduct one road safety audit for each town. Criteria were established based on a similar effort conducted in Massachusetts, Kissane said.

The agency received 80 responses and moved forward to conduct all 80 audits within an 18-month period, ending in the spring of 2017. In all, the program brought together over 500 participants from towns and municipalities and evaluated 117 miles of roadway and 583 intersections. The audit program covered all geographic areas of the state, including downtown areas and town centers as well as urban, suburban, and rural areas. Each of the 80 audits resulted in a formal report, all of which are posted online.

Elements of a Road Safety Audit

A road safety audit is a formal assessment of the existing conditions of walking and biking routes. Following FHWA’s road safety audit guidelines, a team including experts in traffic, pedestrian and bicycle operations and design focuses on a particular route. The team – which also includes local officials and other stakeholders – works together to evaluate the safety of a particular location through on-site visits. The team looks at accommodations for all road users, ways to improve access, and ways to reduce the potential for crash risk. The audit team then comes up with options for addressing the concerns – including low-cost actions that can be implemented in the short term and higher-cost, longer-term recommendations.

What did they find?

Patrick Zapatka, who managed the road safety audit program for CTDOT, said the audits identified important safety concerns including:

  • inconsistency in sidewalk and crosswalk network, materials, size, and condition;
  • lack of maintenance;
  • lack of Americans with Disabilities (ADA) accommodations;
  • old signage, pavement markings, and signals;
  • vehicle conflicts (speed, volume, trucks, parking);
  • wide travel lanes for traffic; and
  • lack of or incomplete pedestrian connections.

Identifying the problems was just the first step. Each team also came up with long-term, medium-term, and short-term recommendations for addressing the issues.

Conducting Road Safety Audits

Under the Community Connectivity Program, each road safety audit team was unique, depending on the needs and challenges of the individual location. Typical team members included CTDOT staff, municipal officials and staff, law enforcement officials, consultant experts, and community leaders.

The teams gathered pertinent information about the chosen location, including maps, crash and traffic data, and pedestrian counts. Each audit, which lasted a single day, included a pre-audit meeting to discuss objectives and review available data as well as a field audit, during which the team visited the location.

For each location, teams evaluated a range of factors that could promote or obstruct safe walking and bicycling routes, including:

  • shoulder width;
  • sidewalk width and condition;
  • pavement markings;
  • traffic volume;
  • on-road parking locations;
  • presence of bicycle lanes;
  • traffic signalization;
  • topography;
  • drainage; and
  • sightlines.

Following the field audit, the teams conducted post-audit meetings to identify potential short-term and long-term recommendations.

Proposed solutions included infrastructure improvements – such as maintaining sidewalks, signage, sightlines, and crosswalks; upgrading signal equipment and pavement markings; and narrowing vehicular travel lanes to allow for wider shoulders.

In addition, improving communications was a key theme. The audits showcased ways for communities to develop consensus around proposed plans and improvements and helped to improve relationships between municipalities and state agencies.

Taking Action to Improve Conditions

After each town identified needed improvements and solutions, the next step was for CTDOT to provide funding to help towns implement the recommendations. In 2017, the agency launched a $10 million Community Connectivity Grant Program to provide funding for municipalities to perform smaller scale capital improvements. CTDOT again reached out to towns and municipalities with a solicitation and received 80 applications for funding. Although many of the projects proposed for funding stemmed from the road safety audits, applicants were not required to address only those projects. The grants ranged between $75,000 and $400,000 and most of the applicants requested amounts ranging from $200,000 to $300,000.

CTDOT reviewed the applications and made its project selections. In July 2018 CTDOT announced that the State Bond Commission approved its request to fund the program. All municipalities that submitted applications for grants will be notified about specific funding decisions.

In the meantime, the towns “got a free document they can use to go to their local officials to advance some of these needed improvements,” Kissane said. And many towns are moving forward without the grant funding.

For example, the town of New London is targeting available funds to address bicycle and pedestrian challenges identified in its road safety audit. The Williams Street Bicycle and Pedestrian Improvements project includes the construction of a sidewalk, a raised crosswalk, a raised intersection, and shared-road markings for bicyclists. It will be funded with 80 percent federal dollars and a 20 percent match from the town.

CTDOT also has stepped in to address “low-hanging fruit” identified by the various audit teams. CTDOT maintenance staff were invited to participate in the audits and have been able to help towns with tasks such as tree trimming and pavement striping – relatively easy maintenance activities that provide significant safety improvements, according to Kissane.

Challenges and Lessons Learned

Kissane said the audits were a learning process, developing relationships and gathering knowledge from local officials and members of the community.

CTDOT’s initial pilot audit brought in a range of stakeholders who “knew the road” – including public works directors, fire fighters, the police chief, and even the mail carrier, in addition to community members and neighborhood groups. In the process, CTDOT learned that taking two days of people’s time was too much, and for the statewide program it reduced the audits to a single day.

Kissane said she would highly recommend this type of program to other state DOTs. The most beneficial aspect was the one-on-one interactions with the towns during the audit process.

“That’s not something we do in our normal course of business, and we’ve developed better relationships with the towns because of it,” she said.

By reaching out to communities across the state, Kissane said, “it was extraordinary what we learned and what we shared.”

For example, Kissane said one audit revealed disconnects between the local officials and the state DOT. “They had misinformation about what we do,” she said. Now that new relationships have been forged, local officials have a face and a name at the state agency that they can call and ask questions. “That has been a huge benefit,” she said.

As a result of the audits, CTDOT and the 80 towns now have identified issues that need to be addressed and specific ways to streamline needed improvements for bicycle and pedestrian safety and access across Connecticut.

CTDOT officials are hopeful the grant program will continue on an annual basis as a way to continue improving bicycle and pedestrian connections throughout the state.

For more information on the Community Connectivity program, link to the program website or contact Colleen Kissane by email at

[back to top]

Case Studies: Hawaii

Air Quality

Recent Developments: EPA Issues 2020 Automotive Trends Report

The Environmental Protection Agency has issued its Automotive Trends Report covering greenhouse gas (GHG) emissions, fuel economy, and technology since 1975. The report provides information about new light-duty vehicle GHG emissions, fuel economy, technology data, and auto manufacturers' performance in meeting the agency’s GHG emissions standards. For more information, link to the report and to the automotive trends website. (January 2021)

[back to top]

Recent Developments: Study: Thousands of Deaths Could be Avoided with Continued Air Quality Improvements

A study published in the journal Environmental Research found that recent air quality improvements in New York City, if sustained through 2025, could avoid thousands of cases of illness and death among adults and children, with associated economic benefits between $32 billion and $77 billion. The study noted that New York City experienced an average 23% improvement in fine particulate levels between March and May 2020 during the Covid-19 pandemic, compared to the same time period in a previous four-year period. For more information, link to the research article. (3-16-21)

[back to top]

Recent Developments: Research Provides Guidebook for Deploying Zero-Emission Transit Buses

Best practices and lessons learned for deploying zero emission buses are provided in research developed under the TRB Transit Cooperative Research Program. TCRP Research Report 219: Guidebook for Deploying Zero-Emission Transit Buses provides the necessary steps, key stakeholders, and common pitfalls for such deployments. For more information, link to the report. (2-11-21)

[back to top]

Recent Developments: EPA Announces Smartway Excellence Awards

The Environmental Protection Agency has announced its Smartway Excellence Awards for 2020. The awards honor top shipping and logistics companies for superior environmental performance. The awards also recognizes top truck, barge, and multimodal carrier partners that are setting efficiency benchmarks in how they move products and supplies. For more information and awardees, link to the announcement. (11-5-20)

[back to top]

Recent Developments: FHWA Requests Nominations for Round 5 of Alternative Fuel Corridors

The Federal Highway Administration is requesting nominations for Round 5 of its Alternative Fuel Corridors designation program. The first four rounds of corridor designations were announced by FHWA in November 2016, March 2018, April 2019, and June 2020. This fifth round of corridor designations may provide state or local agencies an opportunity to nominate additional corridors, extend currently designated corridors, and/or nominate a different fuel(s) along an already designated corridor. Nominations are due Feb. 24, 2021. For more information, link to the request. (10-28-20)

[back to top]

Recent Developments: FHWA Announces Alternative Fuel Corridors Designations, Summary Report

The Federal Highway Administration has completed the fourth round of designations for its Alternative Fuel Corridors program. With the designation of these corridors, FHWA is continuing to establish a national network of alternative fueling and charging infrastructure along national highway system corridors. FHWA also released a summary report of five regional Alternative Fuel Corridors Convenings held in 2018 and 2019. The report contains information and perspectives from across the country on the installation of alternative fuel infrastructure along highway corridors. For more information, link to the Alternative Fuel Corridors website. (6-24-20)

[back to top]

Recent Developments: FHWA Updates CMAQ Website with 'Project Spotlight'

The Federal Highway Administration has updated its Congestion Mitigation and Air Quality Improvement Program website, including a “project spotlight” section that profiles CMAQ projects. As of 2015, the CMAQ program had provided more than $30 billion to fund over 30,000 transportation-related environmental projects. The FAST Act provided up to $2.5 billion in CMAQ funding for each year of the authorization-2016 through 2020. It emphasizes diesel engine retrofits including construction equipment, port-related landside non-road or on- road equipment, and alternative fuel infrastructure in designated corridors. For more information, link to the CMAQ web page.

[back to top]

Recent Developments: FHWA Issues Alternative Fuel Vehicle Fleet Module for CMAQ Toolkit

The Federal Highway Administration recently has issued a module for on-road alternative fuel vehicle fleet purchases for the Congestion Mitigation and Air Quality Improvement (CMAQ) Emissions Calculator Toolkit. The module allows users to quantify the potential emission reductions that might be achieved when a fleet converts to alternative fuel vehicles or advanced drivetrain technologies. The tool allows modeling of many passenger and commercial vehicle sources, but excludes others such as transit buses. The module, which includes a users’ guide and other documentation, provides information on the appropriate inputs into the Environmental Protection Agency's Motor Vehicle Emissions Simulator (MOVES2014b). For more information, link to the CMAQ Emissions Calculator Toolkit. (3-19-20)

[back to top]

Recent Developments: Research Estimates Emission Reductions from Zero Emission Vehicles

A research report that assesses the emissions impacts of nationwide zero emission vehicle (ZEV) adoption has been developed under the National Cooperative Highway Research Program (NCHRP Web-Only Document 274, NCHRP 25-25, Task 115). Researchers projected changes in emissions of criteria pollutants, mobile source air toxic pollutants, and greenhouse gases resulting from varying ZEV adoption scenarios with a 20-year time horizon. The objective of the report was to help readers to understand what key factors influence the degree to which ZEVs will impact the vehicle fleet emissions. For more information, link to the report. (2-3-20)

[back to top]

Recent Developments: EPA Issues Emission Inventory Methods for Port and Goods Movement

The Environmental Protection Agency has issued a draft document on how to develop port-related and goods movement emissions inventories. The document, Methodologies for Estimating Port-Related and Goods Movement Mobile Source Emission Inventories, has specific information on how to develop inventories for criteria pollutants and precursors, climate-related pollutants, mobile source air toxics, and energy consumption. The document applies to both offshore and onshore forms of transportation, including cargo handling equipment and onroad vehicles. Comments on the draft document can be submitted by March 31, 2020. For more information, link to the document. (2-4-20)

[back to top]

Recent Developments: EPA Issues Advance Notice on Heavy Truck Air Standards

The Environmental Protection Agency is seeking public comments on an advance notice of proposed rulemaking on emission standards for heavy-duty vehicles. The Cleaner Trucks Initiative would establish new emission standards for oxides of nitrogen (NOx) for highway heavy-duty engines and would address certification procedures to reduce costs for engine manufacturers. For more information, link to the ANPR Web Page and related fact sheet. (1-13-20)

[back to top]

Recent Developments: Guidance Updated for Fourth Round of Alternative Fuel Corridors

The Federal Highway Administration has issued an updated question and answer document regarding the FAST Act Section 1413 Alternative Fuel Corridor Designations. The document covers general questions, questions specific to the four different rounds of designations, fuel-specific questions, questions about signage, coordination with the Energy Department, and resources such as FHWA contacts and information about the Alternative Fuel Corridor Convenings. The document has been updated in connection with the fourth round request for nominations. For more information, link to the FAQ. (12-3-19)

[back to top]

Recent Developments: Demand Management Scheme Wins Clean Air Excellence Award

The Environmental Protection Agency has announced the winners of the 2019 Clean Air Excellence Awards. The awardee for the Transportation Efficiency category is RideFinders, a division of the GRTC Transit System, for their Commute Green Summer Challenge in Richmond, Va. The project involved a transportation demand management campaign to reduce the number of single-passenger commute trips and reduce vehicle emissions. Using existing resources, the project documented the emissions reductions, reduced vehicle miles traveled, and fuel savings. Other award categories are clean air technology, community action, education and outreach, state/tribal/local air quality policy, and an outstanding achievement award. For more information, link to the announcement. (11-8-19)

[back to top]

Recent Developments: Nominations Sought for Alternative Fuel Corridor Designations

The Federal Highway Administration is seeking nominations for the fourth round of its Alternative Fuel Corridors designations. This fourth round of corridor designations may provide state or local agencies an opportunity to nominate additional corridors, extend currently designated corridors, and/or nominate a different fuel(s) along an already designated corridor. Nominations are due Feb. 26. For more information, link to the Alternative Fuel Corridors web page. (10-28-19)

[back to top]

Recent Developments: GAO Report Evaluates Federal Agency Use of Alternative Fuel Vehicles

The Government Accountability Office has issued a report on the extent to which federal agencies are using alternative fuel vehicles in their fleets. The report says that federal agency use of alternative fuel vehicles has increased since they were first required to do so in 1988, but that a majority of the fleets are still powered by petroleum. The report also says that of the alternative fuel vehicles in the fleets, most are flex-fuel vehicles that run on gasoline-ethanol blends, with hybrids representing about 11% of federal alternative fuel vehicles and electric vehicles representing less than 1%. The report says that the higher cost of electric vehicles is a factor that keeps agencies from adding more of them to their fleets. For more information, link to the report. (8-26-19)

[back to top]

Recent Developments: Group Urges Congestion Pricing in Cities

A report from the National League of Cities encourages cities to consider congestion charging systems as a solution to build communities, calm traffic, and improve quality of life for residents. Congestion pricing is a type of road user charge system in which a flat or variable rate fee is charged to vehicles that drive in a specified area or zone within a city. The report explains how congestion charging works, reviews pilot programs, and shows the potential advantages and barriers to implementation. For more information, link to the report. (8-19-19)

[back to top]

Recent Developments: EPA Proposes Revised Rule for Sources of Hazardous Air Emissions

The Environmental Protection Agency has announced a proposed rule to establish requirements for sources of hazardous air pollutants that choose to reduce emissions and be reclassified. The rule would reverse the agency’s policy known as “once-in, always in” regarding toxic air emissions. That policy says industrial sources of toxic air pollution subject to strict “major” source air toxics controls must always meet those limits, even if they reduce emissions below the Clean Air Act’s threshold. The proposal would revise what qualifies as a major source and an area source of hazardous air pollutants. The EPA is expected to publish the rule in an upcoming Federal Register. For more information, link to the EPA web page. (6-25-19)

[back to top]

Recent Developments: FHWA Posts Resources on Alternative Fuel Corridors

The Federal Highway Administration has posted several new resources as part of its Alternative Fuel Toolkit. Recently posted items include tools for alternative fuel corridor planning as well as information related to convenings on the South Central, Southeast, and Midwest Alternative Fuel Corridors. For more information, link to the Alternative Fuel Toolkit. (6-13-19) >>See Related AASHTO CEE Resources: AASHTO Air Quality Community of Practice

[back to top]

Recent Developments: EPA Awards Over $13 Million for Cleaner School Buses, Diesel

The Environmental Protection Agency has announced awards totaling over $9.3 million to 43 states or territories to purchase hundreds of cleaner school buses. The grants under the EPA’s Diesel Emissions Reduction Act (DERA) funding will allow state, regional, or tribal governments and organizations to purchase buses that use newer, lower emission diesel buses to reduce pollution and improve public health. The EPA also has announced $3.8 million in DERA grants awarded to various groups in Alaska and the Pacific Northwest for the purchase of hybrid electric or cleaner diesel generators, construction equipment, transit buses, short-haul freight trucks, and school buses. For more information, link to the Region 10 and national announcements. (5-2-19)

[back to top]

Recent Developments: FHWA Newsletter Provides Air Quality, Climate Updates

Recent developments concerning air quality and climate impacts are presented in the recent issue of the Air Quality and Climate Change Highlights newsletter from the Federal Highway Administration. Topics covered include CMAQ computation guidance, alternative fuel corridor nominations, and renewable energy in rights-of-way. The newsletter also spotlights various meetings, conferences, symposia, workshops, and training opportunities. For more information, read the January/February 2019 issue. (4-4-19)

[back to top]

Recent Developments: WRI Issues Costs and Emissions Appraisal Tool for Transit Buses

The World Resources Institute has created a Costs and Emissions Appraisal Tool for Transit Buses. The Excel-based tool allows users to compare the costs and emissions reductions of two bus fleets, each composed of up to three bus types. Bus types can differ in terms of fuel type, the technology used to achieve different emissions standards, and bus length. Users can input fuel and vehicle unit cost data for a city or country and the tool calculates the costs and emissions of each bus type and the total costs and emissions of each fleet. To access the tool and a related discussion paper, link here. (March 2019)

[back to top]

Recent Developments: Report Issued on Global Health Impacts of Transportation Pollution

A review of transportation-related air pollution across the globe has been issued by the International Council on Clean Transportation. The transportation sector produces multiple pollutants such as dust and other airborne particles, ozone, and nitrogen dioxide from vehicle exhaust, vapor from fuels, and dust from unpaved roads, tire wear, and brake wear. The analysis provides updated estimates of the impacts of transportation sector emissions and their health impacts in 2010 and 2015 by linking state-of-the-art models on vehicle emissions, air pollution, and epidemiological analysis to determine the impact on air quality and public health. The report found that 84 percent of global transportation-attributable deaths occurred in G20 countries, and 70 percent occurred in the four largest vehicle markets: China, India, the European Union, and the United States. For more information, link to the report. (3-11-19)

[back to top]

Recent Developments: EPA Extends Deadline for Clean Diesel Grants

The Environmental Protection Agency has extended the deadline to apply for competitive grant funding through its Diesel Emissions Reductions Act Clean Diesel Funding Assistance Program. The program is soliciting applications for projects that achieve significant reductions in diesel emissions in terms of tons of pollution produced and exposure, particularly from fleets operating in areas designated as having poor air quality. Applications are due March 26. For more information, link to the extension notice. (2-21-19)

[back to top]

Recent Developments: CMAQ Guidance Issued on Total Emissions Reduction Measure

Guidance on calculating the total emissions reduction measure to assess on-road mobile source emissions under the Congestion Mitigation and Air Quality Improvement (CMAQ) program has been issued by the Federal Highway Administration. The measure is the 2-year and 4-year cumulative reported emission reductions, for all projects funded by CMAQ funds, by applicable criteria pollutant and precursors for which the area is designated nonattainment or maintenance. The guidance provides a calculation formula as well as frequently asked questions. For more information, link to the guidance. (December 2018)

[back to top]

Recent Developments: DOE Launches Web Version of Fleet Life Cycle Tool

The Department of Energy’s Argonne National Laboratory has announced a new online version of a tool to compare alternative fuel and vehicle technologies. Alternative Fuel Life-Cycle Environmental and Economic Transportation (AFLEET) is a free, publicly available spreadsheet-based tool to help fleet managers optimize their purchasing decisions to reduce their environmental impacts and save money. AFLEET was originally launched in 2013 and is now issued as a web-based option. For more information, link to the AFLEET tool. (2-1-19)

[back to top]

Recent Developments: Diesel Idle Module for CMAQ Emissions Calculator Toolkit Released

The Federal Highway Administration has released a new module of the Congestion Mitigation and Air Quality (CMAQ) Emissions Calculator Toolkit. The Diesel Idle Reduction Technologies tool is one of a series of spreadsheet-based tools that can be used to facilitate the calculation of representative air quality benefit data, for CMAQ project justification, as well as the annual reporting requirements. The toolkit is a resource to help with the implementation of the CMAQ program, which supports surface transportation projects and related efforts that contribute to improved air quality and reduce congestion. Additional toolkit modules are released as they become available. For more information, link to the toolkit. (1-3-19)

[back to top]

Recent Developments: Smart Transportation Systems Can Improve Truck Environmental Impacts

The National Center for Sustainable Transportation has issued a research study of the potential for using intelligent transportation system (ITS) technologies that take into account the presence of trucks in the traffic flow in order to reduce fuel consumption and pollution levels in areas of high truck volume. According to the study, the sizes and movement dynamics of trucks create traffic disturbances that affect other vehicles and cause increased fuel consumption and pollution. The study proposes an integrated variable speed limit, ramp metering, and lane change controller using feedback linearization. The integrated controller keeps the bottleneck flow at the maximum level and homogenizes the density and speed of the traffic flow along the highway sections. Results show improvements in fuel economy and emissions under different levels of perturbation and noise. For more information, link to the report. (2018)

[back to top]

Case Studies: Georgia - Georgia DOT's Commuter Program Leverages CMAQ Funds for Travel Demand Management

The Atlanta metropolitan area is one of the fastest growing population centers in the nation, and the Georgia Department of Transportation is working to make sure that having more people does not mean having more air pollution.

To accomplish that, GDOT has a suite of air quality initiatives, including diesel retrofits, improvements to highway incident management, and traffic signal optimization.

Of these, one of the lowest cost efforts with measurable results is Georgia Commute Options, GDOT’s travel demand management program operated in partnership with the Atlanta Regional Commission and local Transportation Management Associations (TMAs).

The program provides multiple benefits to the dynamic Atlanta region, according to Phil Peevy, GDOT’s Air Quality and Technical Resource Branch Chief. Congestion on the area’s highways is reduced when residents choose alternatives to driving by themselves, eliminating approximately 1.1 million vehicle miles traveled daily. Also, air pollution emissions are reduced by an estimated 550 tons per day.

Additionally, there are the intangible benefits of creating a more livable, friendly community for residents. “It is such a beneficial overall project,” Peevy said.

Outreach effort for Georgia Commute Options Program. Photo: Georgia DOT

Managing Travel Demand: A Low-Cost Option

Georgia Commute Options operates with funding from the Federal Highway Administration through its Congestion Mitigation and Air Quality Improvement (CMAQ) Program. Recent studies and information from the FHWA indicate that travel demand management is a low cost but effective means of reducing air emissions. As compared to other programs such as transit upgrades or diesel retrofit programs, travel demand management ranks sixth in funding but third highest in total projects obligated.

Georgia Commute Options tackles the problem of single-occupancy vehicle travel in a number of ways. For instance, the program facilitates carpooling by making it easier to find people to share a car with. Those interested in participating can register at the program website where they will be joining tens of thousands of people already participating. The program matches carpoolers together based on where they live and where they work.

Additionally, the Georgia Commute Options offers a “Guaranteed Ride Home” option in which registered carpoolers can receive up to five rides per year—with some restrictions—in any of 20 counties in the region.

Georgia Commute Options also promotes vanpooling, which can carry up to 15 passengers to work. As with carpools, the program website helps participants find vanpools that operate close to home and work and includes the guaranteed ride home for unexpected situations. Public education and outreach for the carpool and vanpool programs are “100 percent eligible” for CMAQ funding, Peevy said.

Employers can partner with Georgia Commute Options to provide incentives to their employees to find commuting alternatives. The program provides free services to partners, such as consultations, metrics, webinars on alternative work arrangements, onsite events, and customized employee surveys. By offering alternative transportation options to commuters, these programs help employers to boost employee morale, enhance recruitment efforts, and reduce parking and facilities costs, Peevy said.

At present, more than 1,600 employers and property managers are participating, according to the website, and awards are presented annually in recognition of excellence.

Having a telework program is one thing an employer can do to participate, and Georgia Commute Options provides assistance, webinars, and a toolkit to design a program that works best for a company or organization. Sample policies, telework agreements, and memos to management, as well as surveys and checklists are some of the resources available on the website. Georgia Commute Options also sponsors a yearly Telework Week to train both workers and managers on successful telework arrangements.

Biking to work also is supported and promoted by Georgia Commute Options. The program offers on its website links to information regarding trails and other bicycle facilities, bike safety classes and advocacy, and a smart phone application developed by Georgia Tech that records bicycle travel data. Also, there are links to bicycle maps issued by the Atlanta Regional Commission and to GDOT standards, planning and guidance for bike and pedestrian facilities. Annually, the program sponsors a bike challenge, according to Peevy, which includes a series of outreach events.

Additionally, the Georgia Commute Options website provides links and information regarding nearly 20 transit systems both within the metropolitan Atlanta region and in other parts of the state. For example, the recent initiation of streetcar service in downtown Atlanta provides a new transit option that interconnects with the heavy rail system operated by MARTA, to fill in gaps in the public transportation system. The streetcar, a joint operation headed by the city of Atlanta, currently covers 2.7 miles with plans for future expansion throughout the downtown central business district.


Georgia Commute Options uses the power of technology to educate commuters, consolidate resources, and disseminate information, mostly through the program website. GDOT used a consultant to develop and provide ongoing operation of the website, according to Peevy. “However, Georgia DOT owns the website,” Peevy said.

Using resources from a previous website created by GDOT, the consultants made some enhancements and relaunched it as “Over the past year, improvements have been made to streamline the website to make it easier for users to find information, request materials, and sign up for Georgia Commute Options programs,” Peevy said.

In addition, to the website, the program holds a variety of events across the 20-county Atlanta area each month to educate commuters about the program.

Incentive Program

A key piece to attracting new participants is the incentive program for clean commuters which is funded with CMAQ funds, these incentives include:

  • $3 a day, up to $100, for commuters to try out a clean commute option and log their trips on the program website;
  • a $25 prize from a monthly drawing of the commuters who log clean trips on the website;
  • $40-$60 monthly gas cards for carpools, depending on ridership; and
  • a $50 vanpool ride referral, for vanpoolers who refer a new vanpool rider and the new rider completes three consecutive months in a vanpool.

The incentives have been successful so far at reducing single-occupancy vehicle travel. Citing studies conducted by the Center for Transportation and the Environment on behalf of GDOT, Peevy said that with the $3-a-day program, 85 percent of the participants have continued with their clean commuting choices for as much as 24 months after completing the program.

Furthermore, the Georgia Commute Honors are held annually to recognize employer partners, property managers and individual commuters for their outstanding efforts, according to Peevy. “Publicly recognizing the employers that go the extra mile to make clean commute programs available to their employees goes a long way toward making those partners feel valued by the program, and thereby makes them more likely to continue their efforts,” Peevy said. The honorees are all participants in CMAQ-funded programs, Peevy said, and the ceremony is covered by a combination of CMAQ and state funds.

Lessons Learned

Georgia Commute Options is essentially attempting to change human behavior, and “it takes a while to do that,” Peevy said. He said the program tries to “focus on the long-term change.”

Also, since Georgia Commute Options is a completely voluntary program, “gas prices play a major role in participation numbers,” Peevy said. When gas is inexpensive and plentiful, participation in the program goes down, Peevy said.

Additionally, Atlanta has a federally-designated “smog season” that runs from April 1 to October 31. That is the busiest time for transportation demand management programs, and the best time for Georgia Commute Options to roll out new incentives and programs, Peevy said.

In 2015, for instance, the program offered the “Commute Pursuit,” a challenge to find better commute options. The challenge, which ran until July 31, included cash incentives to find a carpool, answering daily trivia questions about commuting, and posting pictures of clean commuting to social media. The promotion spurred an increase in participation. More than 500 people registered with Georgia Commute Options during the promotional period, with 101 of these commuters entering the $3 a day programs.

In regard to the incentive programs, a consultant handles the day-to-day operations. “Each month, the contractor runs reports to determine which commuters are eligible to win prizes then sends the prize recipients an e-mail with instructions to redeem their reward,” Peevy said. The prizes can be in the form of Visa reward cards, or in some cases a retail purchase reward, according to Peevy.

Peevy said the Georgia Commute Options program could easily be modified for use in other states, noting that there are a few states that have already done this exact thing.

“I would also recommend to anyone starting a new program from the ground up to keep their initial goals realistic and understand these programs can take time to get up and running,” he added.

For more information, see the Georgia Commute Options website or contact Phil Peevy, Georgia Department of Transportation at

[back to top]

Cultural Resources

Recent Developments: AASHTO Publishes Historic Bridge Preservation Guide

A guide on historic bridge preservation has been published by the American Association of State Highway and Transportation Officials (AASHTO). The Historic Bridge Preservation Guide is a reference for the preservation and rehabilitation of both fixed and movable historic highway bridges. Historic preservation laws present a unique set of challenges when maintaining bridges, and balancing cultural and historic value with functional safety characteristics requires specialized knowledge and processes. This Guide aims to familiarize all engineers with the unique and diverse skills needed for successful historic bridge preservation and rehabilitation projects. For more information and to purchase the guide, link here. (12-4-20)

[back to top]

Recent Developments: President Signs Great American Outdoors Act

Legislation signed by President Trump on Aug. 4 establishes the National Parks and Public Land Legacy Restoration Fund, which will use revenues from energy development to provide up to $1.9 billion a year for five years to support deferred maintenance projects on federal lands. The measure also permanently funds the federal Land and Water Conservation Fund, which reinvests a small percentage of offshore energy revenues in conservation and recreation access projects. For more information, link to the release. (8-4-20)

[back to top]

Recent Developments: FHWA Soliciting National Scenic Byways Program Nominations

The Federal Highways Administration has announced the opening of nominations for roads or highways to be designated under the National Scenic Byways Program. Byways can be nominated to be either a National Scenic Byway or an All-American Road designation. Qualities that demonstrate the significance of the byway include features that have archeological, cultural, historic, natural, recreational, or scenic value. The agency had not accepted nominations during the 12-year period that the program was without congressional authorization. The agency held a webinar on Feb. 26 to discuss the process. For more information, link to the FHWA’s nominations page. (2-19-20)

[back to top]

Recent Developments: NCHRP Issues Report on Highway Noise and Historic Properties

Practices that state transportation agencies have used to mitigate the long-term effects of noise on historic properties are the focus of a new report issued under the National Cooperative Highway Research Program. NCHRP Project 25-25, Task 106, Highway Noise & Historic Properties: A National Review of Effects & Mitigation Practices, provides six case studies as examples of the current state of practice where project officials have resolved instances of adverse effects from increased traffic noise. The practices, ranging from conventional noise walls to sound-reducing landscaping, have involved extensive collaboration and consideration of the project context. For more information, link to the report. (3-7-19)

[back to top]

Emerging Technologies

Recent Developments: Report Describes Vehicle-to-Everything Hub Project

A report from the Turner Fairbank Highway Research Center describes the Vehicle-to-Everything (V2X) Hub project. The project involves development of individual and consolidated technologies that share safety information between road vehicles, trains, infrastructure, and mobile devices using multiple communications media. It was initiated to build a software platform to act as a network intermediary that allows for messages to be sent and received by all users in a connected system. This report describes the V2X Hub system and summarizes feedback and insight from stakeholders that used specific plugins for their V2X Hub deployments. For more information, link to the report. (March 2021)

[back to top]

Recent Developments: FHWA Issues Case Study on Use of Data Dashboards

A report on the use of online, geospatial dashboards by transportation agencies to analyze and display operational metrics and performance targets has been issued by the Federal Highway Administration. The report includes information and best practices from state DOTs on use of data dashboards. For more information, link to the report. (January 2021)

[back to top]

Recent Developments: Webinar Highlights Testbed for Shared, Electric, Connected, Automated Vehicles

A webinar highlighting an innovation corridor testbed for shared, electric, connected and automated transportation is being sponsored by the National Center for Sustainable Transportation. This webinar, scheduled for Dec. 7, will highlight UC Riverside researchers’ efforts to develop an Innovation Corridor testbed consisting of a six-mile stretch of roadway that supports various transportation modes including passenger vehicles, trucks, transit, bicycles, and various forms of micro-mobility. Researchers have instrumented this corridor with roadside communications equipment, advanced traffic signal controllers, and video systems at several key intersections to help improve safety, mobility and environmental sustainability. For more information and to view the webinar, link here.

[back to top]

Recent Developments: Mid-America States Plan for Adoption of Connected and Automated Vehicles

A plan for adoption of connected and automated vehicles was considered by the state members of the Mid America Association of Transportation Officials (MAASTO) at a virtual event held on Oct. 22-23. Issues discussed at the event included development of model legislation and regulations to ensure consistent regulation of CAV technology; cooperating on research and development with academic and industry researchers; establishing regional policy recommendations to ensure that CAV vehicles are safe; and ensuring that the benefits of CAV technology are accessible to all. MAASTO's member states include: Illinois, Indiana, Iowa, Kansas, Kentucky, Michigan, Minnesota, Missouri, Ohio, and Wisconsin. For more information, link to the announcement. (10-22-20)

[back to top]

Recent Developments: Program Will Support Public Transportation Innovations

A national program to promote public transportation innovations – such as automation, electrification, and shared mobility modes – has been launched through a grant from the Federal Transit Administration. The Accelerating Innovative Mobility National Network, launched by the Shared-Use Mobility Center, will provide technical assistance for projects including recipients of the Accelerating Innovative Mobility (AIM) Challenge Grants. For more information, link to the announcement. (10-21-20)

[back to top]

Recent Developments: Sustainability and Emerging Transportation Technology Virtual Forum Planned

A two-part virtual forum on sustainability and emerging transportation technology will be held in October and November, convened by Transportation Research Board and cosponsored by AASHTO and the Federal Highway Administration. Part 1, to be held Oct. 29, will focus on transformation of transportation and mobility services. Part 2, to be held Nov. 5, will be titled Decarbonization, Energy, and Emissions and Urban Planning and TDM: Greener Solutions and Transportation Demand Management. The in-person 2021 Sustainability and Emerging Transportation Technology Conference is planned for summer 2021. (10-1-20)

[back to top]

Recent Developments: Study Looks at Data, Models to Inform Smart City Programs

An analysis of data and models used to inform mobility and energy initiatives for “smart city” programs has been issued by the National Renewable Energy Laboratory. The study focuses on the mobility benefits of automated, connected, efficient/electric, and shared mobility. It discusses an integrated data-sharing environment approach, looking at systems developed by cities in California, Colorado, Missouri, Ohio, Oregon, Pennsylvania, and Texas. For more information, link to the report. (7-15-20)

[back to top]

Recent Developments: Grant Funding Available for Advanced Transportation Technologies

The Federal Highway Administration (FHWA) is making available $60 million in Advanced Transportation and Congestion Management Technologies Deployment Program (ATCMTD) grants to fund new technologies that improve transportation efficiency and safety. The program works to improve the performance of U.S. transportation systems, reduce traffic congestion, and improve the safety of the traveling public. It provides funding to help develop model deployment sites for the large-scale installation and operation of advanced technologies that improve safety, efficiency, and system performance. For more information, see the notice of funding opportunity. (7-6-20)

[back to top]

Recent Developments: Guidebook for Managing Data from Transportation Technology Issued

A guidebook for managing data generated by connected vehicles, sensors, shared-use transportation, and mobile devices has been issued under the National Cooperative Highway Research Program. The guidebook (NCHRP Research Report 952) provides guidance, tools, and a big data management framework. It lays out a roadmap for transportation agencies on how they can begin to shift – technically, institutionally, and culturally – toward effectively managing data from emerging technologies. For more information, link to the guidebook. (6-18-20)

[back to top]

Recent Developments: FHWA Awards $43 Million in Technology Grants

The Federal Highway Administration has announced the awarding of $43.3 million in Advanced Transportation and Congestion Management Technologies Deployment grants to ten states for projects using cutting-edge technologies, including advanced real-time traveler information, vehicle communications technologies, artificial intelligence, regional approaches and bicycle-pedestrian safety features. The agency announced the following grants: Metropolitan Washington Council of Governments, Florida, Hawaii, Missouri, North Carolina, Ohio, Tennessee, Virginia, and Washington. For more information, link here.

[back to top]

Recent Developments: Report Details Emerging Technologies, Data Sources to Influence Travel Behavior

A summary of emerging technology and data sources that can enhance active transportation and demand management (ATDM) systems has been issued by the Federal Highway Administration. The document includes data, vehicle, sensor, and decision support technologies, as well as data sources on connected travelers, vehicles, and infrastructure. It informs agencies of the technologies and data sources available to help achieve proactive management, including illustrative case studies. For more information, link to the report. (March 2020)

[back to top]

Recent Developments: Study Reviews Impact of Emerging Technologies on Transportation

The effects of new transportation-related technologies on public agencies is the subject of new research issued under the National Cooperative Highway Research Program (NCHRP Research Report 924). The research evaluated the potential impacts of transformational technologies, including wireless telecommunications, shared vehicles, connected vehicles, fully autonomous vehicles, alternative fuel vehicles, smart cities and communities, big data analytics, and the internet-of-things. The report includes background information, provides a desk reference that describes various technologies, and discusses technologies’ impacts on transportation agencies. For more information, link to the research report. (2-6-20)

[back to top]

Recent Developments: FHWA Issues Report on Automated Vehicle Modeling Peer Exchange

The Federal Highway Administration has issued report on a one-day peer exchange on Automated Vehicle (AV) modeling, held June 27, 2019, in Phoenix, as part of the Transportation Planning Capacity Building (TPCB) Peer Program. With increasing interest in AVs and the potential impacts they are expected to have on the nation's transportation network, many transportation agencies are actively exploring ways to address AV modeling considerations in the long-range transportation planning process. The peer exchange brought together five MPOs to discuss their approaches to AV modeling. The peers discussed AV modeling, managing risk and uncertainty in modeling, communicating model results, modeling information gaps, and resource needs. For more information, link to the report. (12-11-19)

[back to top]

Recent Developments: ASCE Launches Future Vision for Infrastructure

The American Society of Civil Engineers has launched a vision project regarding the future of infrastructure. The project includes a report, a recent article, and an interactive website that map out key trends and the potential outcomes of alternative energy, autonomous vehicles, climate change, smart city technologies, advanced materials, and governmental policy and funding. The project also reviews a range of possible future scenarios, including resilient cities, progressive megacities, dispersed settlements, and the potential for inequity in future technological development. For more information, link to the Future World Vision website. (11-5-19)

[back to top]

Recent Developments: Report Highlights Use of 'Big Data' for Traffic Incidents

A report that documents the use of “big data” to improve traffic incident management has been issued under the National Cooperative Highway Research Program (NCHRP Report 904). Big data uses in transportation include applications in the areas of planning, parking, trucking, public transportation, operations, and intelligent transportation systems. The report finds that use of big data “represents a radical change from traditional approaches—a complete paradigm shift—and many of the benefits of Big Data analytics will require aggregating data at least at the state level, if not at the national level.” The ability to merge datasets and mine the data could provide significant opportunities to advance the state of the practice in traffic incident management policies, it said. For more information, link to the report. (10-15-19)

[back to top]

Case Studies: The Ray: Georgia's Innovative Smart Highway

Energy/Greenhouse Gas Emissions

Recent Developments: U.S. EPA Relaunches Climate Change Website

The U.S. Environmental Protection Agency has relaunched its climate change website, providing an information gateway on climate change science and solutions. The site provides greenhouse gas emissions data, information on climate change impacts, scientific reports, and existing climate programs within EPA and across the federal government. For more information, link to the website. (3-18-21)

[back to top]

Recent Developments: Research Updates Role of Transit to Reduce GHG Emissions

An update on the impact of public transit in helping to reduce greenhouse gas (GHG) emissions is provided in a new report from the Transit Cooperative Research Program. The report documents the role of transit as a climate solution, documenting its impacts in 2018. The study found that public transportation in the U.S. saved 63 million metric tons of carbon dioxide equivalent emissions in 2018. The study includes fact sheets, a Power Point presentation, and a spreadsheet tool to help transit agencies see how their agencies’ GHG impacts change with electrification, clean power, and ridership increases. For more information, link to the report.

[back to top]

Recent Developments: AASHTO Publishes First Report in Series on U.S. Commuting Trends

AASHTO has released the first in a new series of reports on commuting in America, produced by AASHTO's Census Transportation Planning Products Program. The report, The Changing Nature of Work is in the series, titled the National Report on Commuting Patterns and Trends. The report provides a snapshot of the nature of work in 2019, with focus on the single-most important trend in work travel—the shift to nontraditional work. Its goal is to help researchers and policymakers interested in quantifying the amount and type of changes in the U.S. workforce in 2020 and later. For a free download, link to the AASHTO Store. (3-12-21)

[back to top]

Recent Developments: Group Launches Effort to Electrify U.S. School Bus Fleet

The World Resources Institute has launched an effort to electrify the U.S. fleet of school buses by 2030. WRI plans to work with a range of partners to simultaneously aggregate demand, scale manufacturing, change policy incentives, develop new financing models, and forge equitable pathways for electrification that can be replicated across the country. According to the group, electrifying the entire fleet of 480,000 school buses would reduce 10 megatons of greenhouse gas emissions per year, equal to almost 50% of annual emissions for all buses in the country. For more information, link to the announcement. (2-18-20)

[back to top]

Recent Developments: Research Finds Mobile Sensors Effective to Track C02 Emissions

Use of mobile sensors on an electrified light rail train, instead of stationary sensors, can improve cities’ understanding of their carbon dioxide emissions, according to a study funded by the National Oceanic and Atmospheric Administration. Mobile sensors attached to a light rail train car allowed researchers greater insight into important carbon dioxide sources – such as interstate highways, downtown areas, power plants, and oil refineries – at a fraction of the cost. Future research could also apply this study framework to air pollutants such as fine particulate matter. For more information, link to the summary. (2-2-21)

[back to top]

Recent Developments: President Biden Signs Order on Climate Change, Environmental Justice

President Biden has issued a broad executive order on actions to address climate change in both foreign and domestic policy. The order includes a “whole of government” approach to address climate change, including measures to coordinate federal agency actions, direct federal agencies to institute science and evidence-based decision-making, prioritize federal procurement of clean, domestic-made fleets, and address climate in foreign policy. The order also calls for government-wide actions to address environmental justice. For more information, link to the order. (1-27-21)

[back to top]

Recent Developments: Three States, D.C. Commit to Regional Program to Reduce GHG Pollution

Three states and the District of Columbia have announced a regional program to cut greenhouse gas emissions from transportation. The Transportation and Climate Initiative Program will require large gasoline and diesel fuel suppliers to purchase allowances for the pollution caused by the combustion of fuels they sell in participating jurisdictions. Auctioning those allowances would generate $300 million every year among the jurisdictions for investments in equitable, less polluting, and more resilient transportation. The total number of emission allowances would decline each year, resulting in less transportation pollution. Other states in the region, organized under the title Transportation and Climate Initiative, have the option to join the effort in the future. For more information, link to the announcement. (12-20-20)

[back to top]

Recent Developments: Experts Issue Roadmap to Eliminate GHG Emissions by 2050

A strategy to reach zero carbon emissions in the United States by 2050 has been issued by a coalition of 100 policy experts. The Zero Carbon Action Plan recommends rapidly increasing the sales of zero emission vehicles (ZEVs); tightening fuel economy/GHG standards for all new cars and trucks; adopting a national low-carbon fuel standard and reducing dependence on automobile travel while increasing access for walking, bicycling, new micro mobility modes, telecommunications, transit, pooled ride-hailing services, and other low carbon choices. In addition, it calls for supporting low-carbon biofuels and electrofuels for aviation, ships, and long-haul trucks, as well as local policies that increase the use of automation for electric, pooled vehicles. For more information, link to the announcement and related webinar video and blog post. (11-3-20)

[back to top]

Recent Developments: California to Phase Out Gasoline-Powered Cars

The California Air Resources Board (CARB) will require sales of all new passenger vehicles to be zero-emission by 2035 and will take additional measures to eliminate harmful emissions from the transportation sector, under an executive order issued by Gov. Gavin Newsom. Under the order, CARB will develop regulations that would achieve more than a 35 percent reduction in greenhouse gas emissions and an 80 percent improvement in oxides of nitrogen emissions from cars statewide. In addition, where feasible, the board will require all operations of medium- and heavy-duty vehicles to be zero emission by 2045 and drayage trucks to be zero emission by 2035 for. The order also will require state agencies, in partnership with the private sector, to accelerate deployment of affordable fueling and charging options. For more information, link to the announcement and executive order. (9-23-20)

[back to top]

Recent Developments: Fifteen States, D.C. Agree To Advance Bus and Truck Electrification

A coalition of states has agreed to work together to expedite the market for electric medium- and heavy-duty vehicles. Fifteen states and the District of Columbia signed a joint memorandum of understanding to advance the market for such vehicles. The jurisdictions plan to work through a task force facilitated by the Northeast States for Coordinated Air Use Management to develop and implement a ZEV action plan for trucks and buses. For more information, link to the announcement. (7-14-20)

[back to top]

Recent Developments: House Select Committee Members Issue Climate Recommendations

Democrats on the House Select Committee on the Climate Crisis have released a plan with recommendations for addressing climate change and resilience. The report, titled “Solving the Climate Crisis: The Congressional Action Plan for a Clean Energy Economy and a Healthy, Resilient, and Just America,” includes a range of recommendations for Congress. The plan sets forth a goal to reduce warming by 45 percent from 2010 levels by 2030, and to reach net-zero by 2050. It includes 12 “pillars” on issues including investing in cleaner and more resilient transportation and energy infrastructure, clean energy technologies, environmental justice reforms, and climate adaptation efforts. For more information and summaries, link here. (6-30-20)

[back to top]

Recent Developments: Study Looks at Impacts of Covid-19 on Traffic, Fuel Use, Climate Change

Impacts of mitigating the Covid-19 epidemic include a dramatic reduction in traffic, fuel use, and greenhouse gas emissions, according to a study from the UC Davis Road Ecology Center. The study found that total vehicle miles traveled (VMT) at the county and state level had declined by 61% to 90% following the various government stay-at-home orders. It calculated that emissions of U.S. greenhouse gases that cause climate change were reduced by 4% in total and by 13% from transportation, putting the US on track to meet its annual goals for GHG reduction under the Paris Climate Accord. The study also determined that if traffic remained reduced for one year, the reduction in VMT would allow California to meet half of climate change target of 80% reduction from 1990 levels by 2050. The report also documented the corresponding reduction in fuel tax revenues, including approximately $161 million per week in total fuel tax revenues for California state and local transportation projects. For more information, link to the report. (4-30-20)

[back to top]

Recent Developments: EPA Updates Local GHG Inventory Tool

The Environmental Protection Agency has issued an update to its Local Greenhouse Gas Inventory Tool. The tool was developed to help communities across the U.S. evaluate their greenhouse gas emissions by creating an emissions baseline, tracking trends, assess the relative contributions of emissions sources, and other functions. Link here for more information on the tool. (3-19-20)

[back to top]

Recent Developments: New Jersey Unveils Energy Master Plan, Climate Regulatory Agenda

New Jersey has announced an energy master plan that includes, among other things, a goal of having the state run on 100% clean energy by 2050. The plan defines “clean energy” as 100% carbon-neutral electricity generation and maximum electrification of the transportation and building sectors. In conjunction with the plan, Gov. Phil Murphy has issued an executive order to promulgate regulatory reforms that include an inventory of greenhouse gas emissions. The order also calls for revised land use regulations to incorporate climate change resilience into permitting decisions about how and where buildings and infrastructure are built. For more information, link to the announcement. (1-27-20)

[back to top]

Recent Developments: Report Highlights ‘All-In’ Strategy for Climate Action

A report from the America’s Pledge initiative projects how much a comprehensive national climate strategy could reduce greenhouse gas emissions when layered on top of a “bottom-up” scenario led by states, cities, and businesses. Such an “all-in” strategy could reduce U.S. emissions by 49 percent below 2005 levels by 2030, the report said. The report emphasizes three principles: clean electricity and other energy supplies; decarbonizing energy end-uses in transportation, buildings, and industry, primarily through electrification and efficiency; and enhancing the carbon storage potential of forests, farms, and coastal wetlands. For more information, link to the report. (12-9-19)

[back to top]

Recent Developments: NOAA Highlights Research on Extreme Events, Human-Caused Climate Change

An analysis of extreme weather events in 2018 and the extent to which they may have been influenced by human-caused climate change is the subject of research highlighted by the National Oceanic and Atmospheric Administration. NOAA summarized the findings of research published in the Bulletin of the American Meteorological Society, which looked at extreme events related to heat, cold, heavy precipitation and flooding, drought, fires, and sea ice. The analysis of data from events in 2018 around the world looked at historical observations and model simulations to determine whether and by how much climate change may have influenced particular extreme events. About 73% of the 168 research findings published in the series identified a substantial link between an extreme event and climate change; about 27 percent did not. For more information, link to the summary and the full report. (12-9-19)

[back to top]

Recent Developments: UN Report Finds Much Work Still Needed to Limit Climate Change

The United Nations Environment Programme has issued the 2019 Emissions Gap Report, which compares where greenhouse gas emissions are heading against where they need to be and highlights the best ways to close the gap. The report finds that GHG emissions continue to rise despite scientific warnings on the hazards of climate change and political commitments to address it. The report also finds that some countries are not on track to meet their commitments and many have yet to identify a workable strategy for reducing emissions. In addition, the report finds that, even if fully implemented, current nationally determined reductions will not limit global warming to 2 degrees Celsius, strengthening such commitments is needed, and decarbonizing the global economy will require fundamental structural changes. For more information, link to the report. (11-26-19)

[back to top]

Recent Developments: Group Issues Updated EV Corridor Tool for Northeast, Mid-Atlantic

The Georgetown Climate Center has announced the release of the electric vehicle corridor analysis tool version 3.0. The release pairs the tool based on Microsoft Excel with two interactive mapping applications that provide more complex data visualizations using geographic information systems and a simplified real-time display of results. The tool is intended to aid EV charging infrastructure planning by displaying data on the location of existing charging stations, population, vehicle travel data, and commercial activity from Maine to North Carolina. The analysis in the tool was developed through the Transportation and Climate Initiative. For more information, link to the announcement. (10-31-19)

[back to top]

Recent Developments: Study Analyzes Business Case for Automated Transit Technologies

The USDOT’s Volpe Center has published an analysis of the cost-effectiveness of transit automation that can help agencies evaluate which technologies may yield returns in the form of reduced labor or operations costs. Five categories of automation were analyzed: transit bus advanced driver assistance systems (ADAS); automated shuttles; automation for maintenance, yard, and parking/storage operations; automation for mobility-on-demand service; and automated bus rapid transit (BRT). The study found that ADAS technologies have a strong business case, with costs for onboard equipment more than offset by long-term savings in fuel, collision costs, and operating costs. The business case for driverless technologies is contingent on additional research. The analysis is follows from a report issued last year by the Federal Transit Administration. For more information, link to the article in the Transportation Research Record. (10-21-19)

[back to top]

Recent Developments: Report Details Fuel Use, GHG Reductions for Medium- and Heavy-Duty Vehicles

The National Academies of Sciences, Engineering, and Medicine have issued a pre-publication draft of phase two research into the technologies and costs of improving fuel efficiency and reducing greenhouse gas emissions from medium- and heavy-duty vehicles. The report says that the efficiency of gas and diesel engines can be, and still is, being improved. Continued improvements could be based on waste heat recovery systems, better fuel technologies, and more efficient freight capacity. Recommendations include having the National Highway Traffic Safety Administration establish GHG reduction goals for medium- and heavy-duty vehicles consistent with international agreements, and evaluating the life-cycle GHG emissions for fuel-technology pathways that can best accomplish overall goals. The report continues work done previously under phase one of the project. For more information, link to the report. (10-2-19)

[back to top]

Recent Developments: Group Highlights Use of E-Bikes, E-Scooters to Reduce Emissions

An analysis and infographic posted by the Institute for Transportation & Development Policy highlights how use of electric bikes and electric scooters can help drive action to address climate change. The group stresses that such “micromobility” options offer a convenient first- and last-mile solution to connect to transit in cities, and it also can reduce emissions while helping to shift toward sustainable transportation. For more information, link here. (9-24-19)

[back to top]

Recent Developments: NGA Issues Paper on Role of States in Electric Vehicle Acceptance

The National Governors Association has issued a white paper discussing the challenges of and current efforts toward increasing the electrification of the nation’s highway transportation. The white paper says that much is already being done by state governments, including using public funds to increase the number of public charging stations, buying state-owned electric vehicles, and issue purchase rebates or tax credits to purchasers. The white paper also discusses public information efforts to reduce “range anxiety,” addressing equity in electric vehicle use, and methods to address the costs of transitioning the transportation system from fossil fuels to electricity. For more information, link to Transportation Electrification: States Rev Up. (9-16-19)

[back to top]

Recent Developments: Groups Release Model Policy Toolkit for Electric Vehicles

An updated version of AchiEVe: Model Policies to Accelerate Electric Vehicle Adoption has been issued by the Sierra Club and Plug In America. The guide reviews the best policies for creating incentives for people to purchase electric vehicles, including rebates and tax credits, incentives to buy used EVs, sales tax exemptions, HOV lane access, and electrifying public and private fleets. The guide also discusses policies for expanding access to public chargers including wiring codes and ordinances, charging in the public right-of-way, EV investments by utilities, and using the Volkswagen settlement funds. In addition, the guide evaluates vehicle registration fees, equity considerations for vehicle purchases, and public education campaigns. For more information, link to the guide. (9-16-19)

[back to top]

Recent Developments: Minnesota DOT Reports on Ways to Decarbonize Transportation

Strategies for reducing greenhouse gas emissions from Minnesota’s transportation sector are outlined in a report published by the Minnesota Department of Transportation (MnDOT). The report, Pathways to Decarbonizing Transportation, identifies actions and recommendations for reducing transportation-related emissions. These include creating a new Sustainable Transportation Advisory Council, advancing efforts on electric vehicle corridors, identifying clean transportation funding, and analyzing GHG emissions from transportation projects. Other recommendations include adopting clean car standards, expanding biofuel use and infrastructure, and facilitating use of renewable diesel. For more information, link to the report. (9-18-19)

[back to top]

Recent Developments: DOE Issues Assessment of Plug-in Electric Vehicles in the United States

The Energy Department’s Argonne National Laboratory has issued an assessment of the state of the light-duty plug-in electric vehicle fleet in the United States from 2010 to 2018. The report examines vehicle sales, miles driven, electricity consumption, petroleum reduction, vehicle manufacturing, and battery production. The report finds, among other things, that battery electric vehicles and plug-in hybrid vehicles reduced gasoline consumption nationwide by 0.23% in 2018 and by 950 million gallons cumulatively. The report also finds that over the review time frame, the electric vehicles reduced a total of 4.5 million metric tons of carbon dioxide emissions. For more information, link to the report. (March 2019)

[back to top]

Recent Developments: Report Estimates Benefits of EVs in Uber and Lyft Services

The National Center for Sustainable Transportation has issued a research report on the potential emissions benefits from increased electric vehicle use in transportation network company (TNC) fleets. The report says that drivers for TNCs such as Uber and Lyft travel more miles than average and have higher passenger occupancy. The report says that increased use of electric vehicles by TNC fleets would provide substantial emissions benefits, and that more public charging stations are needed to meet the demand created by electric vehicles in TNC fleets. Because TNCs typically don’t own the vehicles, states and local governments would need to create appropriate incentives to encourage the purchase of electric vehicles. For more information, link to the report. (8-13-19)

[back to top]

Recent Developments: Alternative Fuels Corridor Funding Solicitation Announced

The Federal Highway Administration has announced an applied research funding opportunity for transportation agencies to assist with planning for the deployment of alternative vehicle fueling and charging facilities along Interstate corridors with the goal of filling gaps and designating the corridor as “corridor-ready.” The FHWA also has issued a revised handout discussing the current status of alternative fuel corridors nationwide. The deadline for submitting applications for funding is Sept. 9, 2019, and funding decisions will be announced later in the fall. For more information, link to the solicitation and the revised handout. (8-7-19)

[back to top]

Recent Developments: CEQ Issues Agency Energy Management Instructions

The White House Council on Environmental Quality has issued instructions to federal agencies on how to meet performance standards under the May 17, 2018, Executive Order 13834, “Efficient Federal Operations.” The order requires agencies to reduce building energy use, implement energy efficiency measures that reduce costs, and meet other sustainability criteria. The order also addresses statutory requirements concerning the consumption of renewable energy and electricity. The instructions provide details on how agencies are to track and report data regarding, among other things, energy management, greenhouse gas emissions, and sustainable buildings, fleets, and supply chains. For more information, link to the Federal Register notice. (5-3-19)

[back to top]

Recent Developments: NREL Issues Assessment of Electric Vehicle Infrastructure in Maryland

The National Renewable Energy Laboratory has issued an assessment of electric vehicle charging infrastructure in Maryland. The report evaluates Maryland’s current situation and makes recommendations regarding the expansion required for the state to be capable of supporting 300,000 zero emission vehicles by 2025. The analysis makes assumptions regarding travel patterns and includes discussion of variations in the ZEV fleet, evolving consumer preferences, and the availability of residential charging. For more information, link to the report. (February 2019)

[back to top]

Recent Developments: EPA Reports Record Fuel Economy, Meeting of Greenhouse Gas Standards

The Environmental Protection Agency has released an annual report that provides information about new light-duty vehicle greenhouse gas (GHG) emissions, fuel economy, technology data, and automobile manufacturers' performance in meeting emissions standards. The Automotive Trends Report finds that the aggregate fuel economy of the model year 2017 U.S. fleet continues to demonstrate improvement, and that such improvement has been seen in 11 of the last 13 model years. The report also shows that all manufacturers are in compliance with the national GHG emission standards. In addition, the U.S. experienced a record high fuel economy and record low GHG emissions in 2017. For more information, link to the report. (3-6-19)

[back to top]

Recent Developments: FHWA Updates Guide on Renewable Energy in Highway ROWs

The Federal Highway Administration has updated its “Quick Guide” on requirements for energy projects in highway rights-of-way. Presented in a question-and-answer format, the guide is intended to point state DOTs and FHWA division offices to relevant FHWA requirements and needed approvals. FHWA also has made available reports from recent related peer exchanges that brought together multiple state DOTs. The events were held in Maryland, Utah, Missouri, and Massachusetts. FHWA also has highlighted the topic in the Winter 2019 issue of Public Road magazine. For more information, link to FHWA’s Renewable Energy Projects in Highway ROW web page. (1-25-19)

[back to top]

Case Studies: Massachusetts - MassDOT Public-Private Partnership Generates Solar Energy on Highway Rights of Way

Generating 6 megawatts (MW) of electricity per year from solar farms is not a typical goal for a state transportation agency. But for Massachusetts DOT (MassDOT), setting that goal is part of a 20-year public-private partnership it has embarked upon with a renewable energy company located in the eastern part of the state.

Under the contract, the private sector partner has agreed to finance, develop, design, construct, commission, operate, maintain, and eventually decommission solar facilities at ten pre-approved sites it leases across the state. The rows of ground-mounted solar panels are located on small parcels of state-owned land along highway embankments, exit ramps, and service plazas.

Phase 1A of the MassDOT Highway Right of Way Solar Photovoltaic Energy Program was completed in October 2015 and included five locations. Phase 1B, comprising five additional locations, is awaiting start of construction. And Phase2A, as envisioned, will include three additional sites.

“We are very pleased to be spearheading an initiative that is bringing both economic and environmental benefits,” says Hongyan Oliver, Project Manager of the solar program.

Solar arrays, such as this facility along I-90, are being developed on MassDOT’s highway rights of way. Photo: Massachusetts DOT

“The state expects to generate at least $15 million in savings over the contract period. These savings include about $2 million in rent from the leases on state properties, money that goes into the state’s transportation fund. What’s more, the arrangement entailed zero upfront capital cost for us,” according to Oliver.

Another advantage of forming a public-private partnership is the generous incentives available to the private sector partner. In this case, besides receiving a federal income tax reduction, its partner also is tapping into the state’s Solar Renewable Credits (SREC) system. For its part, MassDOT obtains all net metering credits and associated energy savings. The state’s net metering policy allows a customer to sell power generated by distributed generation back to the grid at a certain price (the meter spins backwards).

“We are purchasing 100 percent of the electricity these solar farms are generating,” explains Oliver. “And because our partner is benefitting from the solar incentives, the purchase rates we have been able to negotiate are significantly lower than current utility rates. At this point, the solar power from the ten planned sites can meet approximately six percent of our needs; we expect that figure to rise as more solar farms from our partnership enter the grid.”

The solar program also brings strong environmental benefits. The power being generated will produce zero greenhouse gas emissions, says Oliver, thereby supporting Massachusetts’ commitment to a green and clean economy. It also supports MassDOT’s GreenDOT sustainability initiative.

“Once we fully reach our goal of generating 6 megawatts (MW) of electricity per year, we anticipate a CO2 emissions reduction of approximately 6.8 million pounds annually due to replacing fossil fuel electricity in the grid with solar power,” Oliver explains. “That is the equivalent of annual greenhouse gas emissions from 630 passenger vehicles.”


MassDOT has joined a small but growing number of state DOTs that are beginning to utilize highway rights-of-way (ROW) as locations for siting renewable energy production facilities. Oregon led the way in 2008, becoming the first agency in the United States to install a solar panel array along a highway ROW (see related case study). Over the next several years, Ohio and Colorado followed suit. In addition, at least seven state DOTS have constructed solar array or wind turbine installations at rest areas or carports that abridge highways, according to a recent FHWA publication.

Original Impetus, Careful Site Selection

The agency began its foray into the solar energy field in 2011 by releasing a parcel of state land adjacent to a highway to the adjoining town. The town had received an American Recovery and Reinvestment Act grant to produce solar power for its water treatment plant.

“Actually, we received indirect benefits from the project in that the public began to become accustomed to the concept of solar panels being installed next to a highway,” Oliver explains.

During that same year, her agency was beginning to have discussions about developing what now is the MassDOT solar program.

“One of the first things we did was contact our counterparts in Oregon,” Oliver explains. “Although the business model we eventually selected was different, many other components were the same. ”

The agency began with a small pilot project in the western part of the state designed to supply one-third of the energy needs of a nearby District Highway Administration building. Then it was time to move into the next phase, its multi-facility program.

“Realizing that site selection was one of the most critical elements, we hired a consultant to do the evaluation,” says Oliver.

Criteria for selection included parcel size and orientation, any existing environmental concerns, distance from the grid, easy access during construction, no interference with highway operation, and no conflict with future transportation use. Another consideration was whether a site was adjacent to a federally-funded highway, which would mean obtaining FHWA approval. Finally, if either environmental concerns or a solar zoning by-law was present, town approval would be needed.

Once sites were selected, a Request for Response (RFR) was sent out and the current partner company was selected after a three-stage competitive process. Prior to the issuance of the RFR, the Department updated its utility accommodation policy in coordination with the FHWA Mass division. Its policy now includes guidelines for renewable energy technologies. It also outlines safety criteria and design standards, the project development process, compensation requirements, and relevant license and lease agreements.

Less conspicuous than the rows and rows of solar panels, the inverter, transformer and data acquisition system are the heart and the brain of a solar farm. (Photo: Massachusetts DOT)

Multiple Installations, Multiple Advantages

“Developing multiple sites across the state under the same program umbrella makes us somewhat unique,” says Oliver. “From our perspective, this approach has a number of advantages.”

First, she explains, it requires only one procurement document, and the process is carried out through a single open bid. Second, with multiple sites in the same project, the owner and operator of the solar farms may be able to purchase equipment and subcontractors’ services in bulk at a discount, and construction mobilization can occur at multiple sites simultaneously.

“In addition,” according to Oliver, “we have been able to learn through experience as we move through the program and integrate more strategic approaches along the way.


Other states may be well positioned to create similar programs, she said. Those that decide to pursue such a program should be aware of any site conditions or regulatory constraints that can affect generation capacity as well as available incentives.

“In our case, for instance, construction for the five sites in Phase 1B originally was slated to begin in spring 2015. However, that start date has been put on hold due to the situation of excess-demand for net metering incentives in Massachusetts.”

Oliver also advises that other states “work very closely with other divisions and sections to incorporate all concerns and requirements during site selection and development.”

Fortunately, she continues, her Planning Division uses a 25-year projection window, an extremely compatible timeframe in this case. She and her team members maintained constant communication throughout the process, especially during site selection.

Oliver concludes, “So far, the decision to use some of our highway right-of-way land to produce solar energy has proven to be extremely sound. And looking ahead, we anticipate only more of the same. ”

For more information, contact MassDOT Project Manager Dr. Hongyan (Lily) Oliver at or link to

[back to top]

Case Studies: Oregon - 'Solar Highway' Offers Model Approach for Renewable Energy

An array of hundreds of solar panels stretching 540 feet along an Oregon highway is helping to power a nearby interchange with clean, renewable energy through a unique public-private partnership that could serve as a model for the nation.

Oregon’s “Solar Highway Project” sits at the interchange of Interstates 5 and 205 in Tualatin, Ore., at the south end of the Portland metropolitan area. The project is the nation’s first roadside solar photovoltaic demonstration project.

According to the Oregon Department of Transportation, the project’s 594 solar panels produce about 122,000 kilowatt hours annually. The panels produce energy during the day which is used to light the interchange at night. ODOT buys the energy produced by the array at the same rate the agency pays for regular energy from the grid.

This clean, renewable source of energy will help the agency meet the mandate from Oregon Gov. Ted Kulongoski that state agencies obtain all of their electricity from renewable sources. By replacing energy from the grid, the solar electricity produced by the project will avoid the production of nearly 43 metric tons of carbon dioxide equivalent emissions each year.

The $1.28 million project, which has been in operation for just over one year, was developed through an innovative public-private partnership between ODOT; Portland General Electric (PGE), Oregon’s largest utility; and US Bank. Material providers included Solar World US, the nation’s largest solar panel manufacturer, and PV Powered, the nation’s largest inverter manufacturer.

Making the Most of the ‘Right-of-Way Asset.’

ODOT Project Director Allison Hamilton explained that under this unique partnership “the public gets multiple values out of its right-of-way asset.”

“Using state and federal tax credits, the renewable energy projects are developed at least possible cost, which benefits the utility rate payers – including ODOT and the State of Oregon, “ Hamilton said. At the same time, ODOT gets green energy at grid rate instead of the higher green energy rate, she added.

“The solar energy project is owned, operated and maintained by the utility, which also assumes all the risk, and is responsible for maintenance of the right of way for the term of the contract (from 25 years up to 40 years or more),” Hamilton explained. But the utility also gets to count the project towards its renewable energy portfolio requirements, she said.

“It’s a win-win-win business model,” Hamilton added.

ODOT officials and PGE officials have deemed the project a success, demonstrating that solar arrays can complement and not compromise the transportation system.

In fact, Hamilton said the project has exceeded expectations, producing more than the expected 112,000 kilowatt hours in its first year, with only one maintenance incident where a panel was cracked and had to be replaced.

As a result, Oregon DOT and its partners – utility providers and private businesses – are poised to expand production of solar energy at the demonstration site and as well as other locations in the state.

Third Party Financing Model

According to ODOT, these public-private partnerships are expected to follow the same type of third-party financing model developed for the demonstration project.

“The utilities would contract with solar developers to design, build and install the arrays, which they – the utilities or limited liability companies involving the utilities – would own, operate and maintain, and which could count towards meeting statutory requirements to develop renewable energy resources. The utilities would also be responsible for maintenance and successful operation of the arrays, including any damage due to vandalism or crashes,” according to a summary on the demonstration project website.

ODOT would have a 25-year agreement to purchase all electricity generated by the solar projects, with options to renew for up to three five-year extensions.

DOTs Urged to Work with Utilities

Hamilton said many other states have expressed interest in following Oregon’s lead, but she stressed that each state will have unique circumstances. “Because each state has its own utility regulations, I would recommend project proponents work with or through their utility to learn the most efficient and cost effective way to size, permit and connect a project, and also to determine the most advantageous financing and ownership model,” she said.

“We learned that the larger the installation, the better, as you are able to spread your fixed costs out over more kilowatts, bringing down the cost per installed kilowatt” compared to the cost of existing grid energy.

Hamilton urged transportation agencies that are interested in developing a solar highway project to take advantage of the expertise of the utility, whose core business is energy generation.

“Oregon’s state transportation system has nearly 19,000 lane miles of right-of-way and there are more than 8 million lane miles of right-of-way across the nation,” according to an ODOT project summary. “Solar arrays on less than 1 percent of Oregon’s right-of-way could supply the nearly 50 million kilowatt hours needed annually by the state transportation system,” the agency said.

The project has been recognized with numerous honors, including the Federal Highway Administration’s 2009 Environmental Excellence Awards.

A wide range of information is available on the project website, including a solar highway meter that tracks energy generated on-site, news releases, photos, videos, research, technical documents, and information on planning for future projects. Additional information also is available by contacting Allison Hamilton at

[back to top]

Case Studies: Tennessee - Tennessee DOT's 'Green Islands' Program: Distributing Renewable Fuels Across the State

The Tennessee Department of Transportation (TDOT) is promoting the use of renewable fuels across the state, increasing the number of fueling stations that offer renewables through its “Green Islands” program.

While E10 (a mixture of 10 percent ethanol and 90 percent gasoline) is now widely available, an increasing portion of the U.S. automobile fleet has been manufactured to be "flexfuel," and able to use E85 (a mixture of 85 percent ethanol and 15 percent gasoline). Additionally, most diesel engines are able to use B20 (a blend of 20 percent biodiesel and 80 percent petrodiesel). However, a major impediment to increasing adoption of renewable fuels such as E85 and B20 is the lack of infrastructure to distribute the fuel.

TDOT faced this issue by helping establish a "green islands biofuel corridor network" of fueling stations not more than 100 miles apart along the highways that connect the state's major cities and destinations. The goal of "green islands” is to enable travel across the state using biofuel exclusively. These alternative fuel stations provide public access to biofuels along major corridors for consumers wishing to use them and reduce their consumption of fossil fuel. While some gaps in the network remain, TDOT will continue to offer grants to fuel stations as incentives to fill the gaps.

Tennessee DOT’s Green Island program increases public access to biofuels. Source: Tennessee DOT

“Increasing the availability and use of biofuels in Tennessee will help increase energy security, reduce air pollution and benefit the state’s economy, according to Alan Jones, Manager of the Policy Office in TDOT’s Long Range Planning Division. “The Green Islands grant program encourages fuel stations to offer these fuels to the driving public,” he said.

‘Farm to Fuel Tank’ Vision

The benefits of reducing fossil fuel consumption and displacing imported petroleum with alternative fuels have been discussed for many years. However, the "green island" concept accelerated in the early 2000's when the Tennessee Farm Bureau started investigating how the state's agricultural community could assist in biofuel production. A vision of a vertically integrated biofuels industry wholly within Tennessee ("From Farm to Fuel Tank in Tennessee") began to take hold.

The Tennessee legislature was called upon to pass legislation to implement the vision. Proponents discussed obtaining seed money, such as grants, to advance the concept. The legislature determined that encouraging in-state biofuel production was in the state's economic interest, and therefore worth providing incentives. One law passed by the legislature named the TDOT to be the agency to manage a grant program for fuel stations to encourage increased availability of biofuels to motorists and vehicle fleet owners in the state. The grant program offered funding to purchase and install biofuel storage and fuel dispensing equipment across the state. TDOT stepped up, administering a program to provide public access to the fuel.

TDOT has since published several Requests for Proposals (RFP) aimed at gas stations willing to make biofuels publicly available for four years, in return for grant funding to help purchase and install the infrastructure. A subsidy was set at a maximum of $45,000 per biofuel pump. The maximum grant was capped at $90,000 for a single location, if the station proposed to sell both biofuels, E85 and B20, to the general public.

While most applicants proposed one or two pumps, several owners proposed multiple stations to achieve economies of scale. One owner proposed three locations, and received a total benefit of $270,000. Presently there are 60 E85 pumps statewide. Around half were installed by private sector operators deciding on their own to offer biofuels to their customers.

When stations meet their four-year contract obligation, many continue to sell the fuels, but some do not. Stations that have been the most successful helped market the fuel on their own. The vision of "From Farm to Fuel Tank in Tennessee" remains, although increasing the use of biofuels has lagged for numerous reasons. State grant funds remain available for stations still interested in selling alternative fuels.

Funding for the program has come from several sources. The state's first E85 pump, which came on-line in 2003, was funded by the U.S. Department of Energy. In air quality nonattainment areas, TDOT used funds from the Federal Highway Administration's Congestion Mitigation and Air Quality Improvement Program. TDOT also received significant state funding from the state’s General Assembly for the green islands program.

An important part of the program includes increasing public awareness about biofuel, its benefits, and where drivers can purchase these cleaner fuels. As part of the interstate blue logo sign program, TDOT developed and posted blue signs with a biofuel image to advertise the locations of green island stations.

Grants provide an incentive for fuel stations to install the fueling infrastructure but, in the long run, stations will not continue to sell biofuels unless their customers buy them. Sustaining market demand for biofuels will require a more vigorous advertising and public education campaign at the state and national level.

For more information on the program, contact Alan Jones, Policy Manager, Long Range Planning Division, TDOT, at

[back to top]

Case Studies: Vermont - Vermont’s Solar Power Plan Aims to Help Meet Renewable Energy Goals

The Vermont Agency of Transportation (VTrans) expects to use an increasing number of properties and rights-of-way for the installation of solar power projects that could help the agency meet its renewable energy goals, reduce emissions and save money, joining seven other state departments of transportation in developing such facilities.

The Vermont Agency of Transportation Solar Plan was issued in December 2016 to help with the complex decision making involved in siting and operating solar projects.

The plan defines for the agency the costs, benefits and processes of solar photovoltaic (PV) installation in the state, with the goal of understanding and navigating toward successful solar developments. The plan is required by state law, but just as importantly it serves to communicate the agency’s goals to the public, said Gina Campoli, a retired VTrans project manager who oversaw the plan development.

The Vermont Agency of Transportation is installing solar projects to offset energy use at its properties statewide, such as this solar array at the Rutland Airport. Photo: VTrans

“The former [state transportation] secretary felt it was very important for the public to understand the various processes that we were using to develop projects, [including] why we were developing projects, why on Earth the Agency of Transportation was getting into the solar business, what were the processes we were going to use when we planned projects, just like we would for a transportation project,” Campoli said.

Vermont joins a growing number of state DOTs, including Arizona, Connecticut, Florida, Massachusetts, Minnesota, Ohio and Oregon, that are beginning to use transportation properties for siting renewable energy facilities, according to the plan. Vermont used Oregon DOT’s solar plan as a reference for their own, even commissioning the same consulting firm to prepare the plan, Campoli said. (See related case studies for Massachusetts and Oregon.)

Solar PV at VTrans

There has never been a better time for VTrans to install solar generation, according to the plan. It describes several factors driving the momentum for solar PV at VTrans. These include:

  • Saving on energy costs. Systems that VTrans has already installed in Rutland and at various maintenance garages statewide are providing significant cost savings for electricity, with the project at the Rutland State Airport expected to save the agency $400,000 over 30 years.
  • Installation costs are going down each year. Using VTrans staff for construction saves even more on up-front costs, a strategy the plan recommends for smaller projects.
  • Aligning with state policies to consume cleaner energy, mitigate climate impacts, and build resilience. In the event of an emergency loss of power, PV systems can provide continuous power to VTrans or to feed power back to the grid, creating greater resilience.

Also, the Vermont state Comprehensive Energy Plan sets an ambitious goal of having 90 percent of the state’s energy needs—both state government operations and the private sector—met by renewable sources by 2050, Campoli said. For VTrans, that means power for street lights, traffic signals, all of the equipment in the maintenance garages, computers and office lights. “There is a ton of power we consume,” Campoli said.

The state energy planning requirement has allowed VTrans to document and better understand its energy footprint, Campoli said. Knowing the amount of energy use “justifies the investment in solar,” she said.

“There is enough sun in Vermont,” Campoli said.

How to Implement

The plan discusses how VTrans—or any other state DOT—would pursue development of more solar PV projects, steps that include assembling a project team, evaluating potential project sites, evaluating financial arrangements and ownership models, performing due diligence, and final implementation.

At VTrans, a team has already screened candidate sites at VTrans-owned properties and highway rights-of-way sites. Using tools such as VTrans’ geographic information system, the mapping office found that 124 out of 375 sites demonstrated potential for solar PV. Further screening has narrowed the list to 24 sites.

After sites are identified, VTrans must conduct analysis to determine whether the site merits continued development. Such analysis includes a study of the requirements for utility interconnection, environmental impact analysis at the state and, if necessary, federal level, and engagement with stakeholders and the public.

As a public agency, VTrans would need to investigate possible public-private partnerships including a power purchase agreement—where the agency agrees to buy electricity from the project developer—and a site license or lease agreement that grants a third party the right to install the system. Also, VTrans would need a net metering agreement with the local utility to allow the agency to receive credit for its power production, something VTrans is already doing with the solar arrays installed at maintenance garages, Campoli said.

Key Considerations

VTrans will need to make some organizational adjustments to continue to pursue solar projects. The plan recommends having a dedicated PV projects manager and the necessary support from agency leadership.

Additionally, VTrans must consider the markets for renewable energy, federal and state financial incentives, and regulations and policies with regard to renewables, including Vermont’s own renewable energy standard.

If using federal-aid rights-of-way, state DOTs must comply with all federal requirements including ensuring that vehicle safety and the transportation purpose are not compromised, and performing environmental review under the National Environmental Policy Act. Campoli noted that placing solar facilities within federal right-of-way increases the complexity of the project, and therefore nearly all of the projects VTrans has installed so far have been on state land. The 24 sites that VTrans has identified as having a high potential for solar PV are mostly either VTrans maintenance garages or regional airports.

According to the plan, if the project is for a public utility, siting and permitting can be managed in accordance with state's approved utility accommodation policy (UAP) without further FHWA approval. Facility types not currently in the UAP must be referred to the FHWA division office, and projects that are strictly for private use are subject to federal right-of-way use agreement regulations.

Lessons Learned

The VTrans renewables plan is part of a state planning effort that is an interagency collaboration including the Department of Buildings and General Services and the Department of Public Service, the state’s utility regulator, Campoli said. “We’ve broken down silos on this issue,” she said.

Also, the projects that are operational are already paying dividends. “The Rutland Airport is producing way beyond our wildest expectations,” Campoli said, noting that production can exceed what is promised by PV panel manufacturers.

Additionally, more land with solar panels equals more solar power generation. However, it is important to site the solar panels in locations that consider future transportation needs, Campoli said, by making sure that the panels are not where a future storage area or parking lot will need to go. Meeting the agency’s goals for renewables will require VTrans to find additional sites, such as interchanges or cloverleaves, former quarry or gravel sites, brownfield sites, inactive or abandoned weigh stations, and park and ride areas, the plan said.

Next Steps

VTrans has set a renewable electricity goal for the agency of 25 percent. To meet that target, an additional 610 kW of capacity—that generates 715,000 kWh—is needed. This capacity is equivalent to an additional seven projects like the system installed in 2016 at Fair Haven Welcome Center or 36 additional 15 kW garage projects.

For these larger PV facilities, such as the 75 kW Fair Haven project within the federal right-of-way, the agency will need to establish partnerships. VTrans also should continue to coordinate with stakeholders such as the Vermont Energy Investment Corporation and the various regional planning commissions to determine if VTrans sites could meet mutually beneficial goals, the plan said.

For more information, link to the Vermont Agency of Transportation Solar Plan or contact Daniel Dutcher, Vermont Agency of Transportation Senior Environmental Policy Analyst at

[back to top]

Infrastructure Resilience

Recent Developments: Louisiana DOTD Releases Hurricane Evacuation Modeling Package

The Louisiana Department of Transportation and Development has released a computer-based software package that estimates the time-dependent evacuation behavior of households facing an oncoming hurricane. The Hurricane Evacuation Modeling Package operates on data available from official sources and uses models that have been estimated from observed evacuation behavior in past hurricanes. Once testing is complete, the package is intended to be used as an operational model applied in real time. However, it can also be used as a planning tool by entering data on hypothetical storms and testing different management plans and strategies. For more information, link to the report. (March 2021)

[back to top]

Recent Developments: Guide to Mainstreaming Resilience in Transportation Agencies Issued

A guide on mainstreaming resilience concepts into transportation agency practices has been issued in pre-publication draft form under the National Cooperative Highway Research Program. NCHRP Report 970, Mainstreaming System Resilience Concepts into Transportation Agencies: A Guide, provides a tool agencies can use to self-assess their efforts and to improve the resilience of the transportation system through the mainstreaming of resilience concepts into agency decision-making and procedures. It provides a framework to guide transportation officials in understanding their current resilience actions, identifying where new or modified actions are needed, and recommending steps for implementation. The guide is part of a multi-pronged research effort on resilience in transportation with related work including a summit and peer exchange held in 2018, a series of white papers, and a CEO Primer and engagement effort. For more information, link to the draft guide. (3-23-21)

[back to top]

Recent Developments: U.S. DOT Details Transportation Benefits from COVID-19 Rescue Plan

U.S. DOT Details Transportation Benefits from COVID-19 Rescue Plan

The U.S. Department of Transportation reports that the recently enacted American Rescue Plan Act (ARP) includes $43.2 billion in resources for its continuing response to the ongoing COVID-19 pandemic. It includes $30.5 billion for transit, including operating costs and funds for rural transit agencies, elderly and disabled populations, and transit on tribal lands. It also provides funds for airports and airlines, as well as funds for Amtrak to support rail service. For more information, link to the announcement. (3-17-21)

[back to top]

Recent Developments: U.S. DOT Launches 'Mask Up' Education Campaign for Worker Safety

The U.S. Department of Transportation has launched a campaign to ensure safety of transportation workers during the COVID-19 pandemic. The campaign is aimed at educating travelers and transportation providers on their responsibility to comply with wearing a mask when traveling on all public transportation, including buses, trains, airplanes, and ferries, and while at all transportation hubs. For more information, link to the announcement. (3-19-21)

[back to top]

Recent Developments: FHWA Announces Grants to Test User-Fee Funding Approaches

The Federal Highway Administration has awarded $18.7 million to eight projects to explore new methods of funding highways and bridges. The “Surface Transportation System Funding Alternatives” (STSFA) grants support projects that test the design, implementation and acceptance of user-based systems, such as mileage-based fees. The grants were awarded to six transportation agencies and two coalitions. For more information, link to the announcement. (3-17-21)

[back to top]

Recent Developments: Workshop Recordings on Sustainable and Resilient Supply Chains Available

The National Academies of Sciences, Engineering, and Medicine recently hosted workshops on sustainable and resilient supply chains. The discussions explored the feasibility of introducing advanced manufacturing, logistics and decision-making under alternative supply chain scenarios in different sectors, with a view of strengthening the resilience of communities and adopting environmentally and economically sustainable consumption and production approaches. Materials and recordings are available from the following workshops: State of Global Value Chains and Supply Chains 4.0 (Feb. 3); Sustainability, Resilience, and Risk (Feb. 4); Emerging Technologies (Feb. 17); and Consumer and Civil Society (Feb. 18). (3-3-21)

[back to top]

Recent Developments: State DOT Executives Address Resiliency

Three state department of transportation executives shared their insights into the strategies they use to address everything from infrastructure resiliency to cybersecurity during the 2021 AASHTO Washington Briefing. Executives included Carlos Braceras, executive director of the Utah Department of Transportation and AASHTO’s 2018-2019 president; Margaret Anderson Kelliher, commissioner of the Minnesota DOT and chair of the AASHTO Committee on Environment and Sustainability; and Ed Sniffen, deputy director for highways at the Hawaii DOT and chair of the AASHTO Committee on Transportation System Security and Resilience. Read more in the AASHTO Journal.

[back to top]

Recent Developments: Webinar Will Discuss Tools to Measure Resilient Transportation Systems

Methods to assess the value of resilience in future infrastructure investments will be discussed in a March 18 webinar sponsored by the Transportation Research Board. Speakers will address the costs and benefits of incorporating resilience into the decision-making process, including project prioritization, weighing trade-offs, and making informed decisions on future infrastructure investments. Presenters will discuss tools and guidance for performing such an analysis. For more information and registration, link here. (2-3-21)

[back to top]

Recent Developments: ‘Pandemic Playbook’ Offers Key Practices for Transportation Agencies

A summary of effective practices used by transportation agencies in response to pandemics has been developed under the National Cooperative Highway Research Program. The report, A Pandemic Playbook for Transportation Agencies (NCHRP Research 963/TCRP Research Report 225), addresses challenges agencies are likely to face during a pandemic and “plays” for agencies to consider, based on domestic and international research and interviews with key transportation leaders in the U.S. during the COVID-19 pandemic. For more information, link to the report. (11-12-20)

[back to top]

Recent Developments: TRB Compiles Research Needs Related to COVID-19

An agenda of transportation research needs related to the COVID-19 pandemic has been compiled in a research circular published by the Transportation Research Board. The research needs were gathered through a meeting of thought-leaders at the end of April 2020, and are presented as research problem statements for future consideration. They are grouped into the following categories: operations, resilience, and disaster recovery; supply chain and goods movement; changes in demand, transportation planning, and data; social justice, access, and mobility equity; effects on economics, revenues, and costs (including stimulus); governance and roles during a pandemic; and public health. For more information, link to the report. (11-5-20)

[back to top]

Recent Developments: Report Suggests Federal Policies for Resilient Coastal Communities

Federal policy changes that could support resilient coastal communities are provided in a report issued by the Environmental and Energy Study Institute (EESI). The report distills ideas, findings, and policy recommendations identified during EESI’s Regional Coastal Resilience Congressional briefing series. The findings are organized by six sections—community at the forefront, land use and development, cultural heritage, climate adaptation and resilience data, disaster preparedness, and financing adaptation and resilience. It provides 30 specific recommendations, as well as guiding principles to inform coastal resilience policy. For more information, including the report and related webinar, link to the announcement. (10-26-20)

[back to top]

Recent Developments: NGA Develops State Resilience and Assessment Planning Tool

A tool to help state governors assess state resilience, identify gaps, and plan for natural and man-made disasters has been issued by the National Governors Association. The State Resilience and Assessment Planning Tool (SRAP) uses an all hazards approach to help states prepare for threats including hurricanes and tornados, earthquakes, tsunamis, cyber and physical attacks, and terrorist attacks. Developed under a grant from the U.S. Department of Energy, the tool focuses on energy assurance and continuity of operations for that sector as well as other critical infrastructure systems such as transportation, communications, and water. For more information, link to the announcement. (10-15-20)

[back to top]

Recent Developments: Publication Summarizes 2019 Transportation Resilience Conference

The Second International Conference on Transportation Resilience to Natural Hazards and Extreme Weather Events (TR2019) is featured in the Transportation Research Board’s September 2020 Transportation Research Circular. TRB hosted the event in November 2019 to present advancements in transportation systems resilience. The circular provides a summary of plenary sessions, technical sessions and posters, and an educational flood mitigation demonstration from the conference. For more information, link to the Circular. (9-29-20)

[back to top]

Recent Developments: Bay Area Transit Operators Develop ‘Healthy Transit’ Plan

Nine counties in California’s San Francisco Bay Area have developed a joint plan to address public health on public transit, to help reduce transmission of the coronavirus. The plan is intended to implement public health recommendations while balancing the need to move toward increased capacity service. It provides guidance on implementing mitigation practices for transit employees as well as passengers, including face masks, personal protective equipment, physical distancing, disinfection of surfaces, contact tracing, and wellness screenings. It is in alignment with California’s State Pandemic Resilience Roadmap. For more information, link to Riding Together: Bay Area Healthy Transit Plan. (August 2020)

[back to top]

Recent Developments: Webinar Looks at U.S., International Approaches to Resilience

A webinar on climate change resilience analysis approaches in use by state departments of transportation and international agencies was sponsored by AASHTO on June 29, 2020. The webinar featured speakers from AASHTO, the Federal Highway Administration, the Colorado Department of Transportation, HNTB, the Conference of European Directors of Roads, and Rijkswaterstaat (executive agency of the Netherlands Ministry of Infrastructure and Water Management). Access the webinar recording. (8-4-20)

[back to top]

Recent Developments: GAO Urges Support for Relocation as a Resilience Strategy

Congress should consider establishing a program to support communities that are interested in relocation as a climate resilience strategy, according to a study from the Government Accountability Office (GAO). The study looked at the use of climate migration -- preemptively moving away from vulnerable areas – as a resilience strategy. It also analyzed federal support for climate migration and key challenges and solutions. Link to the report. (8-5-20)

[back to top]

Recent Developments: Caltrans Completes Regional Climate Vulnerability Assessments

The California Department of Transportation has issued the final two of 12 district-based Climate Change Vulnerability Assessment Reports. The reports are intended to help in evaluating, mitigating, and adapting to the effects of increasing extreme weather events on the state transportation system. The reports cover Caltrans’ District 1 (Eureka) and District 5 (Salinas south to Santa Barbara). The climate effects examined include rising average temperatures, higher sea levels, storm surge, and precipitation. These in turn increase the incidence of flooding, drought, wildfires, coastal erosion and mudslides. For more information, link to the announcement. All 12 reports may be accessed here. (7-15-20)

[back to top]

Recent Developments: Georgetown Climate Center Launches Managed Retreat Toolkit

A toolkit of resources to help policymakers evaluate managed retreat as a possible adaptation approach has been launched by the Georgetown Climate Center. Managed retreat is a climate adaptation strategy that relies on voluntary movement and transition of communities and ecosystems away from vulnerable coastal areas. The toolkit will synthesize best and emerging practices for facilitating retreat in vulnerable coastal areas, conserving and enhancing important coastal ecosystems, and preparing higher-ground “receiving communities” to take in residents relocating away from vulnerable areas. It includes resources on crosscutting legal and policy considerations, planning, infrastructure, acquisition, regulatory and market-based information and approaches. For more information, link to the toolkit. (7-15-20)

[back to top]

Recent Developments: July 15 Webinar: GCC's Managed Retreat Toolkit Launch

The Georgetown Climate Center will host a webinar on July 15 to launch its online Managed Retreat Toolkit. Managed retreat is a climate adaptation strategy that relies on voluntary movement and transition of communities and ecosystems away from vulnerable coastal areas. The toolkit will help policymakers evaluate managed retreat as a possible adaptation approach. It will synthesize best and emerging practices for facilitating retreat in vulnerable coastal areas, conserving and enhancing important coastal ecosystems, and preparing higher-ground “receiving communities” to take in residents relocating away from vulnerable areas. For more information, link to the toolkit web page and webinar registration. (6-17-20)

[back to top]

Recent Developments: North Carolina Issues Climate Risk Assessment, Resilience Plan

A plan to increase resilience to climate vulnerabilities in North Carolina has been issued by the state. The North Carolina Climate Risk Assessment and Resilience Plan describes: the projected change in the climate in the state; climate justice considerations; analysis of 11 critical sectors, including transportation, that are vulnerable to climate and non-climate stressors; preliminary actions to reduce risk; and recommendations for nature-based solutions to enhance ecosystem resiliency and sequester carbon. For more information, link to the plan. (June 2020)

[back to top]

Recent Developments: FHWA To Support Temporary Uses for Sidewalks, Parking Areas

In response to the COVID-19 pandemic, the Federal Highway Administration has announced it will consider short-term exceptions to the fair market value requirement for the temporary use of sidewalks and public parking areas in the highway right-of-way as additional restaurant seating or retail space. The FHWA said it will support states as communities seek innovative ways to safely reopen the economy while social distancing. For more information, link to the announcement. (5-28-20)

[back to top]

Recent Developments: Fact Sheet Describes Traveler Information Strategies During Floods

The Federal Highway Administration has issued a fact sheet describing weather-responsive management strategies for traveler information during flood events. The fact sheet provides an overview of traveler information strategies based on lessons learned from transportation agencies in Iowa, Missouri, Nebraska, and North Carolina, as well as the Houston TranStar consortium, while managing flood events that had significant and prolonged impacts and road closures. The fact sheet was published as part of the Weather-Responsive Management Strategies (WRMS) initiative under FHWA’s Every Day Counts – Round 5 (EDC-5) program. For more information, link to the fact sheet. (6-2-20)

[back to top]

Recent Developments: FEMA Issues Pandemic Guidance for Hurricane Season

The Federal Emergency Management Agency has issued operational guidance to help emergency managers respond to incidents amid the COVID-19 pandemic. The document addresses both response planning and recovery planning, including information on FEMA’s operating posture and guidance for state and local governments. It also provides checklists and resources on FEMA operations and additional COVID-19 related guidance to help plan for the 2020 hurricane season. For more information, link to the guidance. (5-20-20)

[back to top]

Recent Developments: Handbook Helps Officials Handle Flooding During COVID-19

A handbook has been developed to assist local officials and emergency managers address “dual disaster” scenarios of potential flooding during the COVID-19 epidemic. The resource, developed by the American Flood Coalition and the American Public Health Association, provides recommendation based on dozens of case studies and guidance from emergency management experts. For more information, link to the announcement and the handbook. (5-21-20)

[back to top]

Recent Developments: Connecticut DOT To Allow Use of Right-of-Way for Outdoor Dining

The Connecticut Department of Transportation (CTDOT) has established a process by which businesses may apply for and obtain a permit to use the state highway right of way (outside of the travel portion of the state road) for outdoor dining and other outdoor activities which ordinarily would not be permitted. The policy was announced in conjunction with the Governor’s Executive Order permitting restaurants and certain businesses to reopen in the wake of the COVID-19 pandemic. For more information, link here. (5-12-20)

[back to top]

Recent Developments: Study Reviews Lessons from CA Wildfire Evacuations

Recommendations to help agencies prepare for, respond to, and recover from wildfires are provided in a study from the UC Berkeley Institute of Transportation Studies. The report looks at the evacuations of eleven major wildfires in California between 2017 and 2019 and offers a cross-comparison to highlight key similarities and differences. The resulting data reveal individuals choices related to evacuating or staying, departure timing, route, sheltering, destination, transportation mode, and reentry timing. It also looks at communication and messaging, non-evacuee behavior, and government response. For more information, link to the study. (5-12-20)

[back to top]

Recent Developments: Recordings Available: AASHTO COVID-19 Virtual Panel Series

During the month of April 2020, the AASHTO Committee on Transportation System Security & Resilience, through its Resilient and Sustainable Transportation Systems (RSTS) Technical Assistance Program, sponsored a series of weekly “virtual panels” focused on priority issues state DOTs are facing as they respond and recover from COVID-19 impacts. Webinar recordings and materials are now available and can be accessed here.

[back to top]

Recent Developments: AASHTO Committee Continues Virtual COVID-19 Panel Series

The American Association of State Highway and Transportation Officials Committee on Transportation System Security and Resilience (CTSSR) is sponsoring a series of “virtual panel discussions” to help state department of transportation leaders stay up-to-date on the latest news regarding the Coronavirus (COVID-19) pandemic. The virtual panel series will be hosted weekly throughout the month of April. For more information and registration, link here.

[back to top]

Recent Developments: AASHTO Posts COVID-19 Resources for DOTs

The American Association of State Highway and Transportation Officials has posted resources to support state departments of transportation in response to the current COVID-19 outbreak. State DOTs are actively supporting their residents, businesses, and local communities, and these resources are available to assist with such efforts. To access the AASHTO resource page, link here. (4-8-20)

[back to top]

Recent Developments: AASHTO Committee Launches Virtual COVID-19 Panel Series

The American Association of State Highway and Transportation Officials Committee on Transportation System Security and Resilience (CTSSR) is sponsoring a series of “virtual panel discussions” to help state department of transportation leaders stay up-to-date on the latest news regarding the Coronavirus (COVID-19) pandemic. The virtual panel series will be hosted weekly for the month of April, commencing Wednesday, April 8, at 3 p.m. Eastern time. For more information and registration, link here.

[back to top]

Recent Developments: Special COVID-19 Edition of Extreme Weather and Climate Change Briefing Issued

AASHTO's Resilient and Sustainable Transportation Systems Technical Assistance Program has issued a special issue of its bimonthly Climate Change and Extreme Weather Briefing focused on COVID-19 issues for state DOTs. To access the issue, link here.

[back to top]

Recent Developments: Iowa and Nebraska DOTs Coordinating to Prepare for Spring Flooding

The state departments of transportation in Iowa and Nebraska have announced preparations to coordinate efforts to strengthen roadways and shoulders in anticipation of spring flooding along the Platte and Missouri rivers. The two DOTs made improvements following the flooding last year so that roads and highways can be kept open longer and recover more quickly from flooding. Also, five new flood sensors have been installed in areas where potential flooding is expected. These sensors will give transportation officials better information about river levels in key areas. For more information, link to the announcement. (3-10-20)

[back to top]

Recent Developments: New Jersey Unveils Energy Master Plan, Climate Regulatory Agenda

New Jersey has announced an energy master plan that includes, among other things, a goal of having the state run on 100% clean energy by 2050. The plan defines “clean energy” as 100% carbon-neutral electricity generation and maximum electrification of the transportation and building sectors. In conjunction with the plan, Gov. Phil Murphy has issued an executive order to promulgate regulatory reforms that include an inventory of greenhouse gas emissions. The order also calls for revised land use regulations to incorporate climate change resilience into permitting decisions about how and where buildings and infrastructure are built. For more information, link to the announcement. (1-27-20)

[back to top]

Recent Developments: New Jersey Report Details Dramatic Sea Level Rise by 2050

A report from the New Jersey Department of Environmental Protection projects dramatic sea-level rise in the state, where sea-level rise projections are more than two times the global average. The sea level could rise from 2000 levels by up to 1.1 feet by 2030, 2.1 feet by 2050, and 6.3 feet by 2100, underscoring the urgency of recent actions to make the state more resilient to the effects of climate change. For more information, link to the report. (12-12-19)

[back to top]

Recent Developments: Roadway Flood-Warning System Receives Awards

A tool developed in Texas to warn motorists of likely roadway flooding has received multiple awards for technical innovation. Developed by the Texas Transportation Institute, Houston TranStar, Harris County Flood Control District, and Texas DOT, the tool combines rainfall and stream elevation data with real-time traffic information to show areas with a high likelihood of roadway flooding. Travelers can avoid these areas and plan out alternate routes. The system has been honored with the National Operations Center of Excellence Transportation Systems Management and Operations (TSMO) Award, as well as awards from the Intelligent Transportation Society of Texas and the Texas Public Works Association. TSMO award winners will be recognized at the AASHTO Spring Meeting to be held May 26–29, 2020, in Kansas City, Mo. For more information, link to the announcement. (12-9-19)

[back to top]

Recent Developments: Caltrans Issues Four Regional Vulnerability Assessments

The California Department of Transportation (Caltrans) has issued four new regional vulnerability assessments as part of its efforts to evaluate how climate change may impact the state’s highway system. The assessments cover Districts 3, 9, 10, and 12 in Orange County and the central part of the state. The assessments look at risks such as extreme temperatures, increased precipitation, storm surge, wildfires, and sea level rise. Caltrans has provided summary reports with overviews and locations of possible impacts, in-depth technical reports describing potential exposure of the highway systems, and interactive maps. Caltrans is conducting assessments for each of its 12 regions. For more information, link to the announcement and to the assessments. (12-3-19)

[back to top]

Recent Developments: FHWA Reports on Road Weather Performance Measures

The Federal Highway Administration has issued a report on performance measures used to evaluate the agency’s Road Weather Management Program. The report shows strong growth in use of tools, programs, and activities by State DOTs and sustained interest and growth in FHWA’s Every Day Counts-supported strategies. The report shows increased need for case studies on management practices and more data sharing. It also shows growth in data generated from vehicle platforms and the need to maintain such systems. In addition, it shows differences in geographic areas and the need to address issues in addition to snow and ice. For more information, link to the report. (Sept. 2019)

[back to top]

Recent Developments: New Jersey to Develop Statewide Climate Change Resilience Strategy

The governor of New Jersey has signed an executive order to establish a statewide climate resilience strategy. The order includes the creation of a state chief resilience officer and the Interagency Council on Climate Resilience. The order also establishes a Climate and Flood Resilience Program within the New Jersey Department of Environmental Protection. By September 2020, the chief resilience officer is to develop and deliver to the governor a strategy to promote the long-term mitigation, adaptation, and resilience of New Jersey’s economy, communities, infrastructure, and natural resources throughout the state in a manner consistent with scientific projections of climate impacts. The strategy will be incorporated into the planning and procedures by state agencies. For more information, link to the announcement. (10-29-19)

[back to top]

Recent Developments: BTS Provides Best Practices in Cybersecurity and Intelligent Transportation Systems

A best practice guide on cybersecurity and intelligent transportation systems has been issued by the U.S. DOT’s Bureau of Transportation Statistics. The report describes practices for planning and conducting a penetration test, including a template test plan to assist local and state DOTs in cybersecurity planning. For more information, link to the report. (9-17-19)

[back to top]

Recent Developments: GAO Urges FHWA to Enhance Accountability in Use of ER Funds

The Government Accountability Office has issued a report urging the Federal Highway Administration to do a better job of documenting the bases for decisions to classify projects as emergency repairs. The GAO found that the agency did not document such decisions in 22 of 25 project files reviewed. The report urged FHWA to more clearly define what constitutes restoration of essential traffic and clarify the policy on when expedited contracting and environmental procedures are allowed. For more information, link to the report. (10-17-19)

[back to top]

Recent Developments: Caltrans Issues Vulnerability Assessments for Parts of Southern California

The California Department of Transportation (Caltrans) has issued climate change vulnerability assessments for three districts in the southern part of the state. The reports focus on the risks posed to the transportation system by wildfires, extreme temperatures and precipitation, sea-level rise, and coastal-bluff erosion. They cover Imperial, Los Angeles, Riverside, San Bernardino, San Diego, and Ventura counties (Districts 7, 8, and 11) and include an interactive mapping application that shows where and how climate change is expected to have an impact. Caltrans is conducting assessments for each of its 12 regions, and it has completed about half of the assessments. For more information, link to the vulnerability assessments page. (9-23-19)

[back to top]

Recent Developments: Study Evaluates Freight Resilience to Supply Chain Disruptions

Guidance on mitigating and adapting to disruptions in supply chains resulting from adverse events, such as earthquakes, hurricanes, blizzards, or other natural or human-made events, is provided in National Cooperative Freight Research Program Research Report 39: Freight Transportation Resilience in Response to Supply Chain Disruptions. The report addresses freight logistics and planning to identify factors that affect system resiliency and ways to mitigate for disruption. It reviews public perception of resilience and the extent to which various factors such as location, disruption type, type of freight, and transportation mode affect resilience planning. For more information, link to the report. (9-23-19)

[back to top]

Recent Developments: Texas Study Analyzes Data, Strategies for Road Weather Management

Strategies for improving the Texas Department of Transportation’s responses to extreme weather events and ability to effectively disseminate weather related information to the public are provided in a report compiled by the University of Texas at Austin, Center for Transportation Research. The report, sponsored by TxDOT, identifies best practices through a literature search and stakeholder input; curates data sources that may assist with operations or post-event analyses; and evaluates use of new technologies and sensing devices that may assist with disseminating information to the public. For more information, link to the report. (July 2019)

[back to top]

Recent Developments: FHWA Issues Synopsis of Integrated Corridor Management Program

The Federal Highway Administration has issued an executive level synopsis of the Transportation Department’s Integrated Corridor Management (ICM) program and, in particular, the ICM demonstration projects. ICM is the idea that state and local transportation departments, along with transit agencies, will collaborate and proactively integrate existing infrastructure and systems along major corridors, managing the corridor as a whole to reduce congestion and negative impacts on other systems. The ICM concept includes having the ability to quickly enable load balancing during an unplanned major congestion event, such as a chemical spill on a highway. The report discusses the current state of the practice in ICM and how ICM deployments can help to lay a foundation for future transportation advancements. The report includes information from demonstration projects conducted for the I-15 corridor in San Diego and the U.S. 75 corridor in Dallas. For more information, link to the report. (8-22-19)

[back to top]

Recent Developments: World Road Association Updates Snow and Ice Data Book

The World Road Association has issued its latest revision of the Snow and Ice Databook, a report on winter transportation maintenance practices from 28 different countries. Updated every four years, the reference provides an overview of ways to address maintaining winter road service for transit, automobiles, freight, bicyclists, and pedestrians. The reference is a way for various transportation agencies to share experiences. For more information, link to the Snow and Ice Databook 2018. (7-15-19)

[back to top]

Recent Developments: NOAA Develops Tool for Handling Stormwater and Coastal Floods

The National Oceanic and Atmospheric Administration has developed an interactive website tool for evaluating coastal flooding thresholds and the potential impact on stormwater infrastructure. The tool includes background information on coastal flooding, the ability to perform a quick flood assessment with user-supplied data, the evaluation of different scenarios to determine impacts to stormwater management, and various recommended actions to address the issue, such as planning, policy, on-the-ground, and funding options. Users can document the output of the Quick Flood Assessment Tool to produce a report for sharing. For more information, link to the Adapting Stormwater Management for Coastal Floods tool. (7-9-19)

[back to top]

Recent Developments: NOAA Offers Online Information Tool for Coastal Flooding

The National Oceanic and Atmospheric Administration has developed a tool to help communities prepare for coastal flooding. The Coastal Inundation Dashboard brings together data from more than 200 coastal water level stations into one easy-to-use web tool. It is intended to help decision makers and coastal residents understand both short-term risks such as an approaching hurricane or nor’easter, as well as longer-term risks like high tide flooding and sea level rise. For more information, link to the announcement and the dashboard. (6-7-19) >>See Related AASHTO CEE Resources: Infrastructure Resilience Topic Overview and Case Studies; Resilient and Sustainable Transportation Systems Program, Resiliency Case Studies: State DOT Lessons Learned

[back to top]

Recent Developments: FHWA Issues Brief on Use of Drones in Flood Emergency Management

The Federal Highway Administration has issued a technical brief describing various uses of small unmanned aerial systems in managing flood emergencies. The brief describes Federal Aviation Administration regulations and the seven basic missions that can be performed by small UAS, including: 1. strategic situation awareness, survey, and reconnaissance; 2. detailed or structural inspection; 3. ground search and rescue; 4. water search and rescue; 5. debris, flood estimation, and damage assessment; 6. tactical situation awareness; and 7. delivery of material. It also outlines which missions are useful before, during, and after a disaster, reviews UAS responses to flooding events, and summarizes the primary use cases. For more information, link to the brief. (May 2019) >>See Related AASHTO CEE Resources: Resilient and Sustainable Transportation Systems Program

[back to top]

Recent Developments: FHWA Highlights Road Weather Initiatives, Products

The Federal Highway Administration has announced case studies, fact sheets, and videos to highlight key topics and aid the implementation of two road weather management solutions under the Weather-Savvy Roads initiative. Pathfinder is a collaboration between the National Weather Service, state transportation departments, and contractors to translate weather and road information into actionable traveler information. Integrating Mobile Observations collects weather, road condition, and vehicle data from agency fleets to improve awareness of road conditions, building on vehicle-based mobile technologies and real-time wireless communications. For more information, link to Weather-Savvy Roads: Resources to Aid Implementation. (4-23-19)

[back to top]

Recent Developments: Urban Flooding in the United States Subject of NAS Report

The current and future costs and impacts of urban flooding in the United States merit national attention, according to a new report issued by the National Academies of Sciences, Engineering, and Medicine. The report says that urban flooding is a complex problem that results from several factors including the capacity of drainage systems, the types of flood sources, and the patterns of development in a particular city. The report also says that the ability to respond and recover from flooding events can vary widely depending on social and economic resources. In addition, the report says that the responsibility for managing urban flooding is distributed across federal, state, and local agencies, and coordination among the parties is essential. The report includes case studies of Baltimore, Chicago, Houston, and Phoenix. For more information, link to the report. (4-3-19)

[back to top]

Recent Developments: Report Addresses Resilience Planning, Policy on Maryland's Eastern Shore

A new report outlines the risks of coastal flooding in the Chesapeake Bay region, an area where the data indicate that sea level is rising at a faster rate than the global average. The report, issued by the Eastern Shore Land Conservancy, documents the current situation in the Maryland’s eastern counties, including data from NOAA tidal gauge records, vulnerability to storm surge, and projections into the years 2050 and 2100. The report also serves as a guide for communities in the region to develop policies and practices in response to the flooding risks. The report includes suggestions and methods for fostering resilience through local policies and both regulatory and non-regulatory actions. For more information, link to the report. (3-13-19)

[back to top]

Recent Developments: AASHTO Resilience Webinar Series Recordings Available

Recordings of AASHTO’s five-part webinar series addressing a variety of resilience topics for transportation agencies are available on the Center for Environmental Excellence website. The 2018 series was sponsored by AASHTO's Resilient and Sustainable Transportation Systems technical assistance program. The series covers lessons learned from Hurricane Florence, seismic resilient highways, building organizational resilience, cyber resilience, and the 2018 Transportation Resilience Innovations Summit and Exchange (RISE). To access the recordings, visit Resilience Webinar Series (December 2018).

[back to top]

Case Studies: Minnesota - MnDOT Strengthens Climate Resilience Using FHWA Vulnerability Assessment Framework

Transportation officials in Minnesota will be better able to assess vulnerability of transportation assets to flooding and select appropriate adaptation options for damaged and at-risk infrastructure following a pilot study conducted by the Minnesota Department of Transportation. “The potential for more frequent extreme precipitation is a major risk facing our state’s aging transportation system,” said Philip Schaffner, Director of Minnesota DOT’s (MnDOT) Flash Flood Vulnerability and Adaptation Assessment Pilot Project.

The project is one of 19 Federal Highway Administration (FHWA)-funded climate vulnerability pilot studies that were carried out between 2013 and 2015. Each of the studies drew from guidance contained in FHWA's Climate Change and Extreme Weather Vulnerability Assessment Framework (FHWA Framework).

Minnesota DOT's climate vulnerability assessment is helping the agency address threats such as this flooded culvert in District 6. Photo: Minnesota DOT

The timing for the project could not have been better, Schaffner said.

In 2012, he explained, MnDOT had just identified climate-related flooding as a major risk to the system in the state transportation plan when Duluth experienced the worst flooding it had seen in centuries. It resulted in more than $100 million in damage to roads and other infrastructure. Other parts of the state also had recently experienced significant flooding. The state’s transportation system assets had not been originally designed to handle such extremely high levels of precipitation.

As it happened, Schaffner continued, at that same point in time, FHWA issued its second-round call for proposals to carry out pilot projects examining the effects of climate hazards on transportation systems. Unlike the broader first round of 2010-2011 pilots that primarily involved coastal locations, projects located inland were especially welcome.

MnDOT’s study had four goals:

  • Better understand the vulnerability of the state’s trunk highway system to flash flooding;
  • Increase system resiliency by developing a methodology to identify cost-effective design solutions;
  • Support the agency’s asset management planning work; and
  • Provide feedback on the FHWA Framework.

One of the first steps taken was to create two technical committees to support the core project team. The first was composed of hydrologists, hydraulic engineers and planners. The other was staffed with climatologists and other state agencies that helped the core team understand and appropriately use climate model outputs. Much of the funding went to hire an external expert who worked closely with the in-house team.

Overall Vulnerability Assessment

For Phase 1 of the study, the team carried out a system-wide flash flood vulnerability assessment of the truck highway system in two of its eight districts: District 1 in the northeastern part of the state, and District 6 in the southeastern part of the state. Both districts had experienced high levels of flooding in recent years.

The assessment focused on the vulnerability of four types of assets: bridges, large culverts, pipes, and roads parallel to streams. A total of 1,819 assets were given vulnerability scores. Dozens of metrics were developed to quantify each asset’s vulnerability. Assessment scoring was based on the FHWA Framework’s definition of vulnerability, which includes three elements: exposure to a climate stressor; sensitivity to climate stressors; and to what extent the transportation system as a whole can adapt if a particular asset is taken out of service. Findings provided a detailed snapshot of the two Districts’ assets’ vulnerability.

Assessment of Individual Assets’ Adaptation Options

For Phase 2 of the study, one high-risk culvert in each district was selected to examine in more detail in order to identify robust, cost-effective adaptation measures.

In District 1, the culvert was located along a stretch of the highway system that borders Lake Superior and already was on a list of assets to be improved. In District 6, the culvert lay beneath a road over a creek in a small town, and no improvements had been scheduled. The study teams examined vulnerability for both culverts under low, medium, and high climate change scenarios.

Adaptation options differed somewhat for each culvert. They included actions such as increasing the size of the culvert, replacing the culvert with a simple span bridge to improve fish passage, and enhancing the floodplain upstream of the culvert.

Next, a cost-effectiveness analysis for each option was carried out. The analysis considered both direct costs to MnDOT as well as social costs such as travel time costs to motorists taking detours. For one of the culverts, a clear adaptation choice emerged -- add cells to the existing culvert design. For the other culvert, the conclusion was more nuanced, depending upon whether or not the analysis included social costs.

Uniqueness, Challenges, Advice

One of the unique features of their pilot project, Schaffner said, is their use of proxy variables. For example, the team used an estimate of the percentage of the drainage area that was forested as a proxy for potential woody debris that could clog a pipe, culvert or bridge opening in the event of a flood.

As is the case for any pilot project, he said, there were challenges along the way. For instance, it was difficult to compile consistent and accurate data for more than 1,800 assets. And upon reflection, there were several factors that would receive greater attention and refinement should MnDOT decide to carry out a new group of assessments.

First, more time would be devoted to discussing how to most accurately weigh each variable. Second, adaptive capacity would be extended beyond traffic volume and detours, which were the primary considerations in the pilot study. In addition, the team would look to more advanced techniques of downscaling data from global climate models.

Schaffner said the FHWA Framework was valuable in providing a “high level” foundation for the project. However, although the team was able to turn to earlier projects for some guidance, it was left to them to develop a detailed methodology. In feedback to FHWA on its Framework, he and his team highlighted the need for greater detail and specificity in terms of metrics.

For other DOTs interested in carrying out a similar assessment, Schaffner advised that they start small geographically and to take their time to calibrate their vulnerability metrics. It also is important to involve your maintenance team and other regional staff, he said. So far as the ability to carry out the project without external consultancy/funding goes, it would depend upon the agency’s in-house skill level and access to data.

Findings from the study are being used to inform MnDOT’s long-range transportation planning and asset management efforts. At this point, though no decisions have been made, the agency is exploring carrying out similar assessments in several of its other districts as well as evaluating other types of vulnerabilities such as slope failure.

Schaffner’s view is that additional assessments likely could be done at much less cost given that the basic methodology already is in place.

”One of the important findings of our pilot project was that adaptation doesn’t always require large, complex projects. In fact, small changes over time can make a big difference in the resilience of the system,” he said.

For more information, contact Philip Schaffner, Policy Planning Director, Minnesota Department of Transportation at, or link to the MnDOT pilot project website.

[back to top]

Case Studies: Tennessee - Tennessee DOT Conducts Statewide Vulnerability Assessment for Transportation Assets

The Tennessee Department of Transportation is responsible for building and maintaining much of the state’s transportation infrastructure. Following a number of extreme weather events, the Tennessee Department of Transportation (TDOT) recognized that the agency’s management of those assets required methodological approach to assess the vulnerability of the state's transportation network.

In May 2010, Nashville, Tennessee experienced a 1,000-year flood event, causing 21 deaths in Tennessee and widespread property damage. In 2013, there were severe weather-related problems on the Cumberland Plateau, in the eastern part of the state. Rockslides blocked traffic in areas lacking alternative transportation routes. In other regions, sinkholes opened on interstate highways.

Tennessee DOT faces extreme weather impacts such as this 2013 rockslide on State Route 25. Photo: Tennessee DOT

These types of extreme events prompted TDOT officials to conduct a statewide vulnerability assessment for its transportation infrastructure as a first step in identifying cost-effective approaches to increasing the resilience of the system. The assessment took advantage of a pilot program offered by the Federal Highway Administration (FHWA).

FHWA has funded a series of studies across the country to begin increasing the resiliency of the country's transportation infrastructure in the face of increasingly frequent and severe weather events. The first round of FHWA pilot projects validated a general approach to conducting an extreme weather vulnerability assessment. They focused primarily on coastal locations where many of the risks were related to storm surge and sea level rise. FHWA’s second round of pilots, although also primarily focused on coastal states, included inland states, and Tennessee became the first inland state to perform a statewide vulnerability assessment.

TDOT is now trying to integrate the results of the screening-level, statewide vulnerability assessment into TDOT’s planning, management and operational policies, according to Alan Jones, Policy Manager, Long Range Planning Division at TDOT. The agency’s assessment has been an important screening tool to identify critical transportation assets, better understand extreme weather risks, and identify specific assets that warrant a more detailed analysis.

FHWA Vulnerability Assessment Framework and Tennessee’s Approach

The Tennessee project developed an approach to the vulnerability assessment that was based on FHWA's Vulnerability Assessment Framework, while also taking into account the unique characteristics of Tennessee and its transportation system. The approach involved identifying critical transportation assets, defining the types of extreme weather events that could occur while taking into consideration expected changes in certain climate variables, assessing the damage potential and resilience of the transportation assets when impacted by the extreme weather event, and combining this information to reach conclusions about the vulnerability of the asset.

To manage the number and range of transportation assets statewide, TDOT's first step was to group its transportation assets into generic asset categories. The categories included roads, rail lines and rail yards, navigable waterways, ports, bridges, airport runways, pipelines, transit systems, and more. It was not possible in this initial screening study to differentiate the unique characteristics of specific facilities, such as pavement binder or age of asset.

Criteria for determining the criticality of an asset included the volume of activity, the asset's strategic importance, the existence of redundant capability, the asset's use for emergency response, and local knowledge of the importance of the asset.

The range of extreme weather events and climate change to be expected in Tennessee was based on analysis of information from the National Weather Service and well-tested global climate models. The types of weather events included were extreme temperatures (both high and low), heavy rain, drought, strong winds and tornados, ice storms, and major snowfalls. Trends in the data identified which counties were most likely to see increased severity and frequency of extreme events. The climate data also identified counties that can expect the most significant changes with respect to projected temperature and precipitation.

The process of assessing damage potential and asset resilience was performed through a statewide survey conducted of transportation stakeholders, such as government agencies, freight carriers, transit service providers, airport authorities, and shippers.

The survey results painted a picture of tremendous variation in vulnerabilities across Tennessee. Key findings included:

  • Wind and flooding are by far the events of greatest concern across the state, potentially affecting multiple classes of transportation assets. For example, there is significant risk from flooding in Memphis. Moreover, wet ground and strong winds could produce large numbers of tree falls and utility poles across roads, severely restricting movement.
  • Movement of vessels, including barges carrying coal and other products, on Tennessee rivers can be disrupted by extreme weather. Locks are vulnerable to flooding and river levels that allow barge traffic are vulnerable to extended periods of high temperature and low rainfall.
  • Rockslides in middle and eastern Tennessee could substantially disrupt transportation networks in areas with limited alternate routes.
  • With the exception of one county, winter weather is a less significant concern.

Next Steps for TDOT

TDOT plans to take a number of steps to implement the results of its vulnerability assessment.

The agency plans to follow-up with TDOT's four regions to communicate the results of the study. This will include developing regional "briefing books" to condense the study and communicate specific vulnerabilities so they can be easily understood and quickly referenced. These briefing books will be tailored to each of the four TDOT regions to account for differences across the State and to make the information more useful to local and regional planners. The agency also will select up to 20 of the state's most vulnerable assets for more refined, targeted analyses, including development of potential adaptation strategies.

In addition, TDOT will incorporate information from the screening-level vulnerability assessment as it develops its risk-based transportation asset management plan (TAMP) required under the Moving Ahead for Progress in the 21st Century Act (MAP-21).

TDOT will also consider additional tasks in following up on the vulnerability assessment.

  • TDOT has already identified slopes near roadways that are most vulnerable to rockslides, TDOT will combine this information with the data regarding locations of expected increased precipitation, to help select priority sites for potential slope stabilization projects.
  • Based on the more detailed assessment of critical transportation assets, TDOT will identify additional adaptation projects for possible addition to the State's Transportation Improvement Program (TIP. TDOT would need to determine how to evaluate adaptation projects against congestion relief projects. This would likely require quantifying the benefits of implementing adaptation projects.
  • TDOT will consider issues associated with whether and how to modify repair and replacement standards so that facilities may be upgraded to a more resilient condition.
  • Developing linkages throughout TDOT and with other transportation agencies (e.g., MPOs) to address extreme weather more effectively.

Lessons Learned and Advice to State DOTs

A statewide vulnerability assessment is an ambitious project and required a significant commitment of time and resources; however, the project results served as a vital screening tool that can be used to determine where best to focus a more detailed study to determine what, if any, adaptation measures might be warranted. For example, the statewide study required grouping assets into classes, such as “roads,” but this approach has substantially limited the number of roads in the state that warrant a further review, a review which will allow more unique characteristics of the asset to be evaluated to determine vulnerability, such as pavement binder, age of the road, and more.

Another lesson learned is the importance of local stakeholder knowledge and input. The project conducted regional meetings across the state and were able to get a much better understanding of what assets and routes are considered critical, or not, from a local perspective. Local knowledge of how assets perform during extreme weather events was also vital to the study. TDOT field staff already have a great deal of knowledge of regional vulnerabilities that were relevant to the study.

More details on the study are available in the pilot project final report. A summary of the TDOT pilot is provided in an FHWA Webinar Recording.

For more information, contact Alan Jones, Tennessee Department of Transportation at

[back to top]

Case Studies: Vermont - Vermont Agency of Transportation Expands Emphasis on Managing Roads in Concert with Streams and Rivers

In the wake of the devastating floods wrought by Tropical Storm Irene in 2011, the Vermont Agency of Transportation is working to expand training and awareness on how to properly manage highway infrastructure in concert with the natural ebb and flow patterns of the state's river systems.

Irene's torrential rains and flooding washed out or damaged hundreds of miles of roads and hundreds of bridges and left entire communities stranded. In its wake, Irene also taught an important lesson: the need to manage the state's road infrastructure to be more compatible with its streams and rivers.

Irene's devastating floods "changed the way we do business in Vermont,” according to VTrans Deputy Secretary Rich Tetreault, who served as the agency’s Director of Program Development and Chief Engineer.

In-stream restoration work following Tropical Storm Irene. Photo: VTrans

Tetreault said VTrans employees are being sent back to the classroom for coursework on the science of rivers. Also known as "fluvial geomorphology," this science stresses how natural cycles of periodic flooding and deposition allow river systems to reach a balanced state known as "equilibrium." Both online and classroom training is available. The contents, which are grouped into three tiers ranging from basic to advanced, have been developed by engineers at the Vermont Agency of Natural Resources.

Managing for Equilibrium

The Tier 1 training - which also is used by ANR for its own staff – is an online self-guided basic course that describes the value of rivers and hydrologic and sediment regimes; explains river behavior, including river morphology, river equilibrium, and channel evolution; discusses rivers and human development, including flood and erosion hazards and efforts to control rivers; and explains how best to manage rivers for equilibrium.

The course summarizes the following key points about river processes and management:

  • Rivers have a natural level of stability that is realized when the power of the river flow is in equilibrium with the sediment load.
  • This balance can be tipped when activities on the landscape or in the river change the amount of flow and sediments delivered to the rivers and/or the power created by the flow and resistance provided by the river channel.
  • When the balance is tipped, the river enters a disequilibrium condition and potentially a channel evolution process and the threat to property and developments is increased.
  • Working with the natural tendencies of rivers to manage for equilibrium is the most cost effective way to reduce river related damages and threats to public safety.

The training helps professionals learn how to better identify areas with severe erosion hazards, how best to mitigate areas where damage has occurred, and how to better design roads and features to avoid future damage. It is applicable to a range of transportation professionals including engineers, technicians, equipment operators, and highway foremen.

"This goes from the hydraulics engineer to the bridge and roadway designers, to the local road foreman and the excavator operator that's working in the river, so they all better understand the dynamics of the river when they are working on public infrastructure," Tetreault said. At the same time, the training is being provided to local agency partners and contractors.

The Tier Two training is a classroom and field-based training that delves more deeply into the topics of physical river processes, aquatic habitat and the interactions between rivers and adjacent infrastructure. It also explains the permitting process and standards that must be met. Emphasis is placed on accommodating stream equilibrium, avoiding practices that trigger further instability, and minimizing impacts to aquatic habitat during emergency flood response and recovery operations when technical support is not available. Contents are particularly geared toward design, construction, maintenance and planning professionals.

It includes “a lot of hands on work, both in the classroom with custom built flumes and in the field, knees deep in a local stream,” said Scott Rogers, VTrans Director of Operations. “We have mandated some of our folks from the maintenance garages attend Tier 2 to become more intimately familiar with the dynamics of the systems. They are the ones running the equipment (or making the decisions on repair work) in the field,” he added.

In 2015, the Tier 2 format was modified slightly to mix participants from VTrans with those from municipalities. In addition, a special training was held for regional planning commission transportation planners and another for private sector engineers. Mixing participants allowed for state-municipal dialogue that resulted in technical transfer and the development of greater appreciation for differing perspectives.

The Tier 3 training currently is under development, with completion scheduled for spring 2016 and training sessions to begin near the end of 2016. Tier 3 will focus on advanced engineering and construction oversight topics, specifically the design and construction oversight of the stream alteration practices outlined in the Vermont Standard River Management Principles and Practices document (2014).

Codifying the River Science Approach

In addition to offering the training courses, VTrans has updated its hydraulics manual to codify the "river science" approach. While the previous manual was based on the hydraulic capacity of infrastructure – focused strictly on water – the revised manual also considers sediment and debris.

The new manual allows for more risk-based design in terms of roadway safety and stream stability. It also corresponds to VTrans' latest stream alteration permit, codifying a process that currently is required under permit but not recognized as a standard by authorities such as the Federal Emergency Management Agency (FEMA).

"The new manual doesn’t change the hydrologists' methodology. It codifies it such that when FEMA comes to town we will have another documented standard to fulfill when they are replacing public infrastructure," Tetreault said.

For example, where slope repairs are needed adjacent to rivers, workers historically had dumped stone down the slope, further constricting the river channel. Such repairs now would start with defining the stable channel dimensions for the river and then building the slope to match - all with the help of fluvial geomorphologists. "Across the board, we are really making this part of our standard operating procedure," Tetreault added.

Understanding River Systems

Tetreault said that the "river science"-based approach is important for all ongoing activities of maintaining existing infrastructure, up to and including reconstruction or new construction of highways. For example, such considerations are important when addressing a culvert replacement or a slope failure or a river channel that needs some adjustment to respond to the built environment around it.

"There is a dynamic going on continuously with the rivers, and there is maintenance going on with drainage systems or even the river itself. People need to be aware of the fact that the river is working and we need to work with it and understand the changes that occur over time," he said. "So the minute you get an excavator out and you're working near a river, stop and think: if I put this rock here or if I remove this tree trunk here, what is it doing to the dynamics of the river as it is now and will be in the future?"

Tetreault said other states with river systems could benefit from the self-administered training course, which is posted online and is free of charge. The Tier 1 training course can be accessed online.

For more information on Vermont's Rivers and Roads program, contact Richard Tetreault, or link to the training summary.

[back to top]

Context Sensitive Solutions

Recent Developments: Grants Available for ‘Asphalt Art’ Initiative

Grant funds are available to cities for art and design to improve street safety, revitalize public spaces, and engage residents of their communities. Bloomberg Philanthropies is providing up to $25,000 each to as many as 20 U.S. cities. Applications are being accepted through the end of April 2021. For more information, link to the announcement. (3-2-21)

[back to top]

Recent Developments: NACTO Issues Resource on Use of Streets for Pandemic Recovery

A guide developed by the National Association of Counties compiles emerging practices from around the world on street design approaches that can help in responding to the COVID-19 pandemic. The guide, Streets for Pandemic Response and Recovery, also includes implementation resources for cities and their partners. Recognizing the rapidly changing nature of this pandemic, the guide will be revised and expanded to include new strategies. As of May 21, 2020, the guide addresses the following street strategies: lanes for biking and rolling; sidewalk extensions; transit lanes; slow streets; pick-up and delivery zones; outdoor dining; and markets. To access the resource, link here. (5-21-20)

[back to top]

Case Studies: Florida DOT - Florida DOT Develops Traditional Neighborhood Development Handbook to Integrate Design Flexibility and Context Sensitivity

The Florida Department of Transportation has used the Traditional Neighborhood Development approach to help communities integrate land use and transportation to achieve increased livability when compared to Conventional Suburban Development, or “business as usual.”

For state DOTs, the challenge to transition from Conventional Suburban Development to Traditional Neighborhood Development often arises when the roadway standards engineers are required to meet for state roads do not provide the flexibility needed to design context sensitive solutions.

Traditional Neighborhood Development typically includes a range of housing types, a network of well-connected streets, public spaces, and a variety of amenities within easy reach of housing.

In 2001, recognizing the need for greater flexibility in design and engineering standards to pursue Traditional Neighborhood Development solutions for communities, Florida revised its “Manual of Uniform Minimum Standards for Design, Construction, and Maintenance for Streets and Highways,” commonly known as the “Florida Greenbook.”

The addition of Chapter 19, Traditional Neighborhood Development, in 2011 to the Florida Greenbook formalized the state’s endorsement of context sensitive approaches to transportation and land use as standard practice. Chapter 19 focuses on network functionality and design standards that support communities. To supplement Chapter 19 and describe the why and how of Traditional Neighborhood Development, Florida DOT published the “Traditional Neighborhood Development Handbook” (2011) providing best practices and facilitating proper design for communities.

Though Florida DOT maintains Chapter 19 and the Traditional Neighborhood Development Handbook, implementation is at the local level. The Florida Greenbook was produced through committees made up of local representatives (e.g., public works directors, consultants, and engineers) while the Traditional Neighborhood Development Handbook was developed over time by experts. The two documents work together to implement the approach.

Lessons Learned

FDOT officials have identified the following key lessons learned from their Traditional Neighborhood Development efforts:

  • Balance: It is not easy to balance building state DOT roadways with the needs of the places those roads runs through. Having an established program that supports Traditional Neighborhood Development allows state DOTs to build roads and provide transportation, while simultaneously supporting communities to survive and thrive along roadways.
  • Justification: Standards like Chapter 19 and guidance like the Traditional Neighborhood Development Handbook help provide justification and backup for decision-making, such as when an engineer or lawyer needs clear direction on what is supposed to be done and can be done in a given situation. It is important to have roadway standards that match Traditional Neighborhood Development for successful implementation.
  • Economic Development: Realizing the potential for streets as economic development. Traditional Neighborhood Development is how you build roads that make money for your community, not just roads that move money through your community.
  • Barriers: Without Chapter 19 or the Handbook, many attempts at Traditional Neighborhood Development were running afoul of existing standards. It can be onerous for an engineer to have to apply for design exceptions every step of the way. With Traditional Neighborhood Development in the Florida Greenbook, the pathway is smoother.
  • Context: Providing Chapter 19 and the Traditional Neighborhood Development Handbook is one way a state DOT can show it understands the issue of context and encourage communities to consider the issue of matching streets to land use to create complete streets.

There is a common belief that roadway engineering standards are entirely based on safety (e.g., “a 12-foot lane is safer than 10-foot lane”) and apply to all conditions, and that deviations are unsafe. As a result, the flexibility that Chapter 19 and the Traditional Neighborhood Development Handbook provides may be initially received with skepticism by engineers and other community stakeholders.

To help stakeholders learn about the benefits of this flexibility, DOTs and local communities benefit from continued dialogue and discussion to understand the advantages of Traditional Neighborhood Development and to gain support and buy-in at all levels. Working through the changes together with emergency response, public works, and other local government stakeholders builds trust. The collaboration informs state DOTs about where locals are coming from and demonstrates that the state DOT is looking out for their interests.

“The Traditional Neighborhood Development Chapter and Handbook let folks build safe, complete, walkable streets that are normally difficult to do under conventional standards,” said DeWayne Carver, Florida DOT’s Chapter 19 technical expert. “If you want to encourage and permit traditional neighborhood development (new or old), then you need thoroughfare standards to match. The TND standards can help us save the great urban places we have in our state by putting the right roadway design in the right place.”

Current Efforts and Next Steps

Like Florida, other state DOTs are also embracing Traditional Neighborhood Development. North Carolina DOT has TND Street Design Guidelines and Massachusetts DOT completely rewrote their guidance for their entire department and highlights Traditional Neighborhood Development case studies in an online toolbox. Others, like Mississippi DOT and Vermont DOT, are implementing complete streets policies and moving towards similar programs.

At Florida DOT, officials have met with internal and external partners to determine what needs to be done differently to implement a complete streets policy. This will likely include a change in state standards to more closely align with Chapter 19 and the Traditional Neighborhood Development Handbook for locations that can use the approach.

The Florida DOT recognizes that Chapter 19 and the Traditional Neighborhood Development documents will soon be ready for revisiting, especially once Florida state standards are updated with complete streets policy. Committees that include local representatives will again be involved early to discuss and implement any needed updates to the Handbook.

For more information on Florida DOT’s Chapter 19 and Traditional Neighborhood Development Handbook, contact DeWayne Carver, State Bicycle/Pedestrian Coordinator, Roadway Design Office/Florida DOT at

[back to top]

Case Studies: AASHTO Best Practice Award Winners

Case Studies: AASHTO Best Practice Award Winners - AASHTO Best Practices in Context Sensitive Solutions Competitions

Environmental Justice

Recent Developments: President Biden Signs Order on Climate Change, Environmental Justice

President Biden has issued a broad executive order on actions to address climate change in both foreign and domestic policy. The order includes a “whole of government” approach to address climate change, including measures to coordinate federal agency actions, direct federal agencies to institute science and evidence-based decision-making, prioritize federal procurement of clean, domestic-made fleets, and center climate in foreign policy. The order also calls for government-wide actions to address environmental justice. For more information, link to the order. (1-27-21)

[back to top]

Recent Developments: Council Issues Coordination Plan to Improve Access to Transportation

Federal agencies will better coordinate transportation services to enhance access for people with disabilities, older adults, and individuals of low income, according to a Report to the President from the Coordinating Council on Access and Mobility (CCAM). The report identifies a range of challenges and describes the council’s strategic plan, including goals to: improve access to community through transportation; enhance cost-effectiveness of coordinated transportation; strengthen interagency partnerships and collaboration with state, local, and industry groups; and demonstrate innovative coordinated transportation. For more information, access the report. (10-1-20)

[back to top]

Recent Developments: Group Identifies Barriers, Strategies for Transportation and Health Equity

A field scan of the current state of affairs regarding health equity in the national transportation system, along with recommendations for addressing the challenges, has been issued by Smart Growth America. The report identifies key barriers to creating a more healthy and equitable transportation system, one that would be focused on getting people where they need to go safely and affordably. The report also provides strategies in six critical areas. The group will host a webinar Jan. 23, 2020, to discuss the findings. For more information, link to The State of Transportation and Health Equity. (12-17-19)

[back to top]

Recent Developments: EPA Issues 2019 Report on Environmental Justice Efforts

The Environmental Protection Agency has issued its fiscal year 2019 progress report on achievements made to enhance environmental justice. The EPA’s efforts include providing approximately $50 million under the Diesel Emission Reduction Act grant program to applicants with a proven ability to reduce diesel emissions in communities facing environmental justice concerns. The agency also says it delivered $64.6 million in brownfields grants to 149 communities to assess, clean up, and reuse contaminated properties, and deleted all or part of 27 sites from the Superfund National Priorities List. The report also catalogs various training and outreach efforts. These include reaching more than 4,000 people from government agencies in all 50 states with online training on how to integrate environmental justice into state programs, training approximately 12,350 community residents, and conducting approximately 300 workshops and community forum activities. For more information, link to the report. (11-20-19)

[back to top]

Recent Developments: Group Issues Report on Equity and Smart Mobility

A new report addresses the need for greater social equity in connection with newer “smart mobility” options, such as expanded transit, transportation network companies including Uber and Lyft, and car and bike sharing. The report from the Center for Neighborhood Technology discusses how mobility links people to employment, goods and services, health care, education, social activities, recreation, and cultural activities, but that access to these transportation options in the U.S. is not always equitable. The report says that communities of color, especially those of limited means, struggle to get reliable and affordable transportation, and that smart mobility may be maintaining, or even increasing, existing inequities. The report is based on national data and local insights. For more information, link to the report. (9-13-19)

[back to top]

Recent Developments: Northeast, Mid-Atlantic States Hold Equity Workshop

A workshop on advancing equity and opportunities for communities was held on May 15, 2019, by the Northeast and Mid-Atlantic states that participate in the Transportation & Climate Initiative. States discussed regional policy issues and a cap-and-invest approach to reducing emissions from transportation. Presentations also highlighted economic and health disparities in areas that face pollution and that are underserved by transportation systems. For more information and a workshop recording, link here. (6-4-19)

[back to top]

Recent Developments: Webinar Outlines Process for Title VI Complaints

An overview of the process for filing complaints under Title VI of the Civil Rights Act was provided in a webinar hosted by the Federal Highway Administration. The webinar covered laws, regulations, and guidance; information on filing and processing of complaints; and investigation processes and outcomes. For more information, link to the webinar and related resources. (2-5-19)

[back to top]

Environmental Management Systems

Recent Developments: FTA Releases Environmental Management and Sustainability Resources

FTA has released three new Environmental and Sustainability Management System (ESMS) publications to its suite of ESMS resources. ESMS is a tool comprised of processes and practices that enables transit agencies to reduce environmental impacts, such as air emissions, and increase operating efficiency in a sustainable manner. Additions include: FTA Guidebook of Best Management Practices for the Development of an Environmental and Sustainability Management System; Eight Steps to Identify Environmental Characteristics and Environmental Influences of Your Organization’s Operations; Three Elements for Sustaining Your Environmental and Sustainability Management System. For more information, link to the FTA ESMS Resource Series. (4-5-21)

[back to top]

Geographic Information Systems

Recent Developments: Webinar Addresses L.A.’s Use of Waze Data to Manage Traffic

Integration of data from the Waze mobile traffic application with the Los Angeles region’s multimodal mobility program was the subject of a webinar sponsored by the Federal Highway Administration. The webinar discussed L.A.’s Regional Integration of Intelligent Transportation Systems (RIITS), an interagency multimodal mobility program in Southern California. The program compiles information from ITS systems including freeway, traffic, transit, and emergency services, and disseminates the information in real-time. The webinar discussed how RIITS is using data from the Waze Connected Citizens Program, a two-way data exchange program that allows government partners to integrate inputs from Waze users with publicly available data. For more information, link to the webinar summary and recording. (7-13-17)

[back to top]

Recent Developments: Study Highlights Oregon Coordinate Reference System

The Federal Highway Administration has released a program study regarding the development of the Oregon Coordinate Reference System, which is used achieve accurate three dimensional geospatial positions using global navigation satellite systems. The reference system, developed by the Oregon DOT, resolves the challenge of integrating survey data collected into geographic information system maps and databases for use in transportation applications. Geospatial surveying tools make it possible to use automated machine guidance equipment for roadway and bridge construction and disseminate information via geographic information systems. It also has created a society ready for real-time information concerning road conditions and work zone updates. For more information, link to the study summary. (7-20-16)

[back to top]

Case Studies: Virginia - Virginia DOT's Environmental Data and Reporting System Improves Communication, Accountability

The Virginia Department of Transportation’s (VDOT) evolution to an environmental data management system started with more than 73 decentralized spreadsheets and personal databases. In 2001, VDOT developed its GIS Integrator, an internal geographic information systems (GIS)-based tool to support the agency’s efforts to improve early project development and environmental review by capturing a spatial inventory of project shapes used to identify existing environmental resources with the potential for project impact through spatial analysis.

In 2003, VDOT expanded their data management solution by consolidating all non-spatial data sources into an environmental data repository called the Comprehensive Environmental Data and Reporting system (CEDAR). This internal web based application provides a single user interface for capturing all VDOT’s environmental business data, including National Environmental Policy Act (NEPA), permitting, and environmental contracts. The CEDAR application synchronizes nightly with the agency’s project pool and active directory databases for improved management of project data and user accounts. It also links to the agency’s GIS Integrator, which allows for streamlined project reviews.

“The CEDAR system provides VDOT staff with an invaluable comprehensive environmental data management tool that has successfully improved communication and accountability, said Geraldine Jones, VDOT CEDAR Administrator. “Since its deployment in 2003 CEDAR has been the backbone of VDOT’s environmental operations. CEDAR’s success, usability, and permanence can be attributed to its user championed platform and staff dedicated to maintain and enhance an application subject to dynamic regulations and processes,” she said.

The GIS Integrator allows users to buffer project shapes to determine potential resource issues. In this case, the project shape was buffered 2 miles for conservations lands. Source: VDOT

The integrated CEDAR system centralizes where staff enter and retrieve data for all VDOT’s environmental activities on a project-by-project basis, allowing for restricted viewing and editing based on roles and permissions. It captures project history, handles all project types – including construction and maintenance – tracks project status through the life of the project and generates system alerts.

The system also:

  • stores, manages and distributes documents;
  • contains a task assignment function;
  • tracks commitments;
  • documents project details such as meetings and phone calls using the journal feature;
  • contains links for environmental permit tracking and houses regulatory agency correspondence;
  • links to VDOT’s Integrated Project Manager (IPM) system, which contains project pool information;
  • links to the GIS Integrator, which allows for digitizing project shapes and spatial analysis functionality to identify environmental impacts in a project area;
  • includes both standard and ad-hoc project reporting such as new projects, tasks schedule, and advertisement schedule; and
  • provides access to project contract and other administrative information.

Benefits of the system include increased project accountability, satisfaction of mandates, and interagency coordination. It also provides documentation for decisions, and offers a tool for communication of commitments, project status, accuracy of project estimates, and efficiency of projects.

Current Efforts and Key Take-aways

Today, VDOT’s CEDAR and GIS Integrator applications are positioned for upgrades. A user advisory committee has been formed to identify functional requirements. The upgrade is expected to come with an updated user interface and be launched within the foreseeable future.

Key motivators for an integrated environmental data management system as exhibited by VDOT’s CEDAR and Integrator include the following:

  • Economic savings: Compared to “pre-CEDAR” 2003, VDOT environmental projects in 2011 experienced notable time savings. For example, the labor hours required to complete tasks associated with a project categorical exclusion (such as a biological assessment, state environmental review, or field survey for endangered species) decreased between 33 and 50 percent.
  • Process efficiencies: CEDAR consolidates applications (project management, GIS, data storage) and makes it easier to document environmental decisions and communicate environmental commitments and project status.
  • Quality control improvements: CEDAR provides standardized spatial data and pre-approved data schemes. It provides a basis for program management and trend analysis.
  • Interagency coordination and relationship building: CEDAR helps streamline interagency coordination by supporting compliance with mandates, reducing the time required for advancing projects through regulatory approvals, compiling all external agency communication, providing transparency of environmental data from all participating entities, and increasing the visibility of project.


VDOT is not alone in its development of an environmental data management system. Though many state DOTs still use spreadsheets, databases, paper maps, and shapefiles as data management tools, many others have developed standalone systems or contemplated environmental data management systems of their own. In August 2015, numerous state DOTs gathered in Oregon and online to discuss data management approaches in their agencies in an effort to share information and experiences across agencies.

VDOT’s advice to other DOTs interested in their own data management systems includes supporting an IT staff dedicated to application maintenance, and involving users from the beginning to confirm requirements and increase staff adoption of the system.

For more information on VDOT’s CEDAR, please contact Geraldine Jones, CEDAR Administrator, VDOT Environmental Division, at

[back to top]

Case Studies: Compilations of Case Studies - FHWA

GIS in Transportation – This website is maintained by FHWA’s Office of Planning, Environment and Realty to highlight noteworthy practices and innovative uses of GIS applications in transportation planning by state and local transportation agencies. This site includes examples of GIS applications listed by State.

[back to top]

Invasive Species/Vegetation Management

Recent Developments: DOTs Participate in Landmark Agreement to Conserve Monarch Butterfly

State departments of transportation are among parties that have signed onto an historic agreement for protection of monarch butterfly habitat. The U.S. Fish and Wildlife Service and the University of Illinois-Chicago signed an integrated, nationwide Candidate Conservation Agreement (CCA) and Candidate Conservation Agreement with Assurances (CCAA) for the monarch butterfly on energy and transportation lands throughout the lower 48 states. The agreement encourages transportation and energy partners to participate in monarch conservation by providing and maintaining habitat on potentially millions of acres of rights-of-way and associated lands. Actions taken under the agreement may preclude the need to list the monarch or could speed its recovery under the Endangered Species Act (ESA). The agreement also provides regulatory assurance and predictability in the event the monarch butterfly is listed as endangered. For more information, link to the Fish and Wildlife Service’s Nationwide Candidate Conservation Agreement web page. (4-8-20)

[back to top]

Recent Developments: New Tools Facilitate Use of Roadsides for Monarch Habitat

New tools to help vegetation management professionals evaluate and use roadsides as habitat for monarch butterflies and other pollinators have been developed as part of a study conducted under the National Cooperative Highway Research Program (NCHRP Research Report 942). A pre-publication draft of the study, Evaluating the Suitability of Roadway Corridors for Use by Monarch Butterflies, looks at the potential for road corridors to provide habitat and provides a landscape model and a habitat calculator as resources for roadside vegetation managers. For more information and links to the model and calculator, link to the pre-publication report and related Monarch Joint Venture website. (1-21-20)

[back to top]

Recent Developments: Synthesis Report Issued on Landscapes for Urban Freeway Roadsides

A synthesis of state transportation department practices for landscape development along urban freeway roadsides has been issued under the National Cooperative Highway Research Program (Synthesis 539). The report addresses sustainable design and maintenance practices in connection with urban landscape development, integrated vegetation management plans, maintenance agreements, the management of the illegal use of the right-of-way such as unpermitted vendors and unauthorized occupants, and work zone safety for maintenance crews. Water conservation and protecting irrigation systems from unauthorized use are also addressed. The report found that more documentation is needed of current landscape practices and policies concerning high-visibility urban freeways with limited pedestrian access, and that guidance is needed on how to incorporate the issues at the project planning stage so that state DOTs can be proactive with design, construction, and maintenance. For more information, link to the report. (8-8-19)

[back to top]

Recent Developments: FHWA Updates List of State DOT Pollinator-Friendly Practices

The Federal Highway Administration has updated its list of pollinator-friendly practices in roadside vegetation management by state DOTs. There are now programs featured from 33 state DOTs, including pollinator habitat programs, guidelines, project enhancements, and vegetation management efforts. For more information, link to the State DOT Pollinator-Friendly Practices section on the FHWA Pollinators website. (2-19-19)

[back to top]

Case Studies: Minnesota and Partner States - Six State DOTs Join Forces to Build ‘Monarch Highway’

A coalition of six state transportation agencies are working together to help monarch butterflies on their migratory journeys by establishing a continuous “Monarch Highway” stretching north-south along Interstate 35.

Departments of Transportation in Iowa, Kansas, Minnesota, Missouri, Oklahoma and Texas are working to improve habitat along the corridor in each state. The state agencies along with the Federal Highway Administration signed a Memorandum of Understanding in the spring of 2016 in which they pledged to collaboratively implement pollinator habitat best practices and promote public awareness of the need to conserve pollinators. The agencies have agreed to develop educational materials together and assist each other as they “inventory, protect, plant and manage pollinator habitats and develop strategies for pollinator-friendly seed mixes.”

Actions to preserve monarch butterflies are becoming more vital. The species has declined by 80 percent over the past two decades due to factors such as habitat fragmentation and herbicide decimation of milkweed plants, which are its larvae’s only food source. The U.S. Fish and Wildlife Service must determine by June 2019 if the monarch butterfly should be listed as endangered under the Endangered Species Act. If the species is listed, its presence throughout the I-35 corridor would trigger additional requirements for federally-funded projects.

Monarch butterfly on milkweed. Photo: U.S. Fish and Wildlife Service

“We all are already carrying out practices that benefit pollinators such as reduced mowing, targeted herbicide use, and planting native vegetation seed mixes,” said Tina Markeson, the Monarch Highway Project Chair and Roadside Vegetation Management Supervisor at the Minnesota Department of Transportation (MnDOT). “But having a multi-state effort brings added benefits.”

One of the key benefits, she said, is the ability to apply for grants as a group, which is attractive to funders looking for broad impact. Also, each state is better positioned for individual grants due to the inherent credibility that comes from participation in a collaborative project. Yet another benefit is the opportunity to discuss what works and what doesn’t. The single message focus also gives added clout and enables common educational materials to be developed at less cost.

Stepping Up Existing Efforts

Individual states have not received specific funding for their Monarch Highway work, nor is there external financial support to administer the initiative, said Markeson. However, participants will be tweaking or stepping up what they already are doing. Her agency, for example, has been planting native seed mixes for about 25 years. Though more expensive than non-native mixes, native plants offer multiple advantages, such as strong root systems for erosion control and water filtration, strong stalks that act as snow fences, and reduced long-term maintenance costs.

To create a baseline and determine what is needed next, each state is carrying out an internal analysis of its own current practices along I-35. Potential actions by states may include:

  • adding or increasing milkweed in seed mixes;
  • cutting back mowing;
  • increasing plantings in targeted areas to reduce habitat fragmentation; and
  • carrying out prescribed burns as a vegetation maintenance tool.

Geographic differences also will affect individual state approaches. In Minnesota, for example, the I-35 corridor includes deciduous and coniferous forest as well as prairie. One component of its approach will be to assess its current stock of flowering trees and shrubs and make pollinator-friendly adjustments as needed. And some of its educational materials will include a reminder that other types of vegetation, not just wildflowers, are part of the solution.

The six-state group plans to step up its collaborative efforts to include regular teleconference calls and annual face-to-face meetings. The Monarch Highway Project Chair position likely will change every two years and by-laws will be developed. Rest areas likely will be the initial focus, with demonstration plots and educational materials made available in all six states. A mock-up of a logo is being circulated for comment, and funding opportunities are being actively explored.

To magnify their work, all six states are working in partnership with other state agencies as well as nonprofit groups. For example, Markeson said her agency is working with the Minnesota Department of Natural Resources and the Board of Water and Soil Resources to coordinate requests for the 30 different types of seed mixes it uses across the diverse biomes found throughout the state. And in Texas, which is responsible for almost double the number of I-35 miles found in the other states, TxDOT will draw on existing resources such as the Texas Monarch and Native Pollinator Conservation Plan.

History of Initiative

Multiple government actions have provided strong justification for the initiative. In 2014, President Obama issued a memorandum calling for increased federal agency efforts to preserve declining pollinators. The following year, the National Strategy to Promote the Health of Honey Bees and Other Pollinators was released. Both documents call out the I-35 corridor as a key focal point.

In addition, in 2015 the White House Office of Science and Technology Policy and U.S. DOT partnered to sponsor a summit of state transportation leaders to advance pollinator habitat. And the Fixing America’s Surface Transportation (FAST) Act contains provisions for the U.S. DOT, in conjunction with willing state DOTs, to encourage habitat development for monarch butterflies and other pollinators. In addition to these national measures, state-specific directives call for reversing pollinator decline, such as Executive Order 16-07 issued by Minnesota Governor Mark Dayton in August 2016, followed by Executive Order 19-28 issued by Gov. Tim Walz.

While these recent actions have helped to create a strong framework, the roots of the Monarch Highway project actually date back several decades to another I-35 initiative. In 1993, the FHWA provided funding to the same six DOTs to create the Prairie Passage Program, with I-35 as its backbone.

Overcoming Challenges

Despite the pluses, Markeson said, Monarch Highway participants likely will face several challenges as they pick up the pace in 2017. First, while they already are carrying out pollinator-friendly practices, factors such as additional staff time and a greater proportion of native seed mix investments could add to costs at a time when some state DOT budgets are shrinking.

An additional obstacle may be that of ensuring continued commitment to maintaining the good work once it is in place. As Markeson explained, “It tends to be easier to find funding for planting than it is for maintenance. We have to make sure that what we are doing will be sustained.”

Yet another challenge may be to fully account for the effects of altering current practices, especially in terms of agricultural interests. For example, some farmers who use roadside mowings for cattle feed have raised concerns about including milkweed in the seed mix.

Advice for other DOTs

To maximize chances for success in a multi-state initiative such as the Monarch Highway, Markeson offered four tips:

  • Find an internal agency champion if possible; in this case, MnDOT Commissioner Charles Zelle has been an outspoken proponent;
  • If there is a related initiative from the past that can help provide a foundation, draw upon it;
  • Continue to exchange information with the other states to build on successes and lessons learned; and
  • Develop and maintain close communication with materials providers, in this case native seed mix producers, so that they have the incentive to develop such mixes and have them available when needed.

What’s Down the Road for the ‘Monarch Highway’?

The ultimate goal is a cost-effective, thriving transportation corridor that serves the needs of both its human and its pollinator species travelers. But ultimate success for pollinators will depend upon a much larger realm of supporters than just these six agencies.

“Many others need to be involved as well,” Markeson said. “We will be doing our part, but dedicated efforts should be underway across the country as well as up into Canada and down into Mexico. The rewards on many levels are indisputable.”

For more information, contact MnDOT’s Tina Markeson at or access the Monarch Highway memorandum of understanding. Information on additional transportation-related efforts to protect pollinators are detailed on the FHWA’s Pollinator web page.

[back to top]

Case Studies: Virginia - VDOT Program Aids Pollinators While Supporting Transportation Goals

The Virginia Department of Transportation (VDOT) is implementing a Pollinator Habitat Program along the state’s highway system that provides much-needed waystations for monarch butterflies and other dwindling pollinator species. Moreover, according to agency officials, the program is entirely consistent with the department’s transportation priorities.

“Our savings on mowing costs alone will be significant,” said Diane Beyer, State Vegetation Management Planner for VDOT’s Maintenance Division. “Currently, each roadside mowing cycle costs approximately $12 million. Under the program, our goal is to reduce mowing frequency from three times a year to once a year.”

Volunteers plant natives at I-95 meadow restoration. Photo: VDOT

Under the program, Beyer explained, stretches along the state’s highways and at rest areas are being planted with native vegetation that provides food and habitat for pollinators. The multi-colored vegetation includes species such as milkweed for monarch butterflies, asters for bees, and goldenrod for birds, bees, and butterflies.

Beyer said the program will bring multiple transportation and environmental benefits. First, the program supports VDOT’s vision of safety while providing increased habitat areas. For example, attractive roadsides have been shown to reduce driver fatigue and improve mood; and wildflower perennials and grasses are not favored by deer, a potential driver hazard. In addition, mowing only the shoulder (and allowing wildflowers to continue to bloom) still maintains line of sight and space for motorists to pull off, and it prevents encroachment of shrubs and trees.

In addition, roadside maintenance time and costs are reduced through planting of self-sustaining, native vegetation. The vegetation stabilizes slopes and reduces erosion; increases storm water and nutrients retention due to deep roots; and reduces other vegetation maintenance costs such as invasive species control and herbicide applications. It also provides a smooth transition to adjacent properties.

The program also contributes to the agency’s broader Integrated Vegetation/Pest Management system through reduced use of herbicides; increased erosion, sediment and stormwater runoff control; and reduction in the presence of invasive species. An additional benefit is the increase in visual aesthetics.

Besides supporting VDOT’s transportation goals, Beyer said, VDOT’s Pollinator Habitat Program also supports the Department’s MS4 program, a critical element of Virginia's stormwater management program. On a national level, it supports FHWA’s Every Day Counts initiative though what Beyer calls its “low-tech, back to basics” approach to innovation and its focus on safety. In addition, the program aligns well with the Presidential Memorandum issued in 2014 on creating a federal strategy to promote the health of honey bees and other pollinators.

Genesis and Development

“As it happened, the inception of our program preceded the Presidential Memorandum by several months,” said Beyer. “The timing was very helpful to us in terms building internal support for what was viewed as a very new approach to maintenance.”

The pilot program began in the fall of 2014. Four plots were planted with plant plugs in northern Virginia, each 900 square feet and containing 13 different species. These initial plantings provided Beyer and her team with a useful means of learning what works and what doesn’t. The plantings also provided a foundation for beginning to educate agency staff and the public about the program and the reasons behind it.

In September 2015, a 15,000 square foot meadow area was planted at a rest area on Interstate 95 (a migratory flyway), also in northern Virginia. Three smaller plantings simultaneously were installed near the rest area building. The latter plantings serve as educational stations with interpretive signage for visitors. A total of 8,000 nectar and pollinator plants from 23 species were planted.

Also during the fall, three areas in southwestern Virginia were planted with seeds (not plants); one of the goals was to analyze which seed mixtures and types of seed planting methods work best. In this case, the areas were medians and roadsides. And at the end of 2015, the program moved into the western part of the state for the first time.

Plants such as this aster attract pollinators on Virginia roadsides. Photo: VDOT

Plans call for the program to be implemented statewide. In 2016, while results from the seed-planting location are gathered, the focus will be to continue to create naturalized gardens and meadows with mature plants at state rest areas. In the meantime, interpretive signage continues to be developed and installed at existing areas. Beyer said the team will integrate solutions to challenges they faced in the early months, such as ensuring continued maintenance of the plots until the vegetation is well established.

Funding and Partners

Currently, the program primarily is funded through the purchase of the “wildflower” license plate, which will continue to be offered to drivers and is supported by the Virginia Garden Clubs. Beyer said, the newly minted “pollinator” license plate currently does not financially support the program, but a bill is being introduced in the 2016 Legislative session to remedy that and direct funds to VDOT in support of the Pollinator Habitat program.

Partners have been essential to the program’s growth, she continued. They include Virginia Dominion Power/Dominion Trust; Valley Land; White House Office of Science & Technology; Loudoun Wildlife Conservancy; Virginia Native Plant Society; and PBS Films. These groups continue to provide needed funding, labor and materials.

Advice for Other DOTs

Beyer said other state DOTs either are planning or beginning to carry out similar programs. Examples included a corridor restoration project from Texas to Minnesota, as well as programs in Illinois, North Carolina, Ohio, and Vermont. Part of the challenge for interstate initiatives, she pointed out, is that DOTs have varying organizational structures, which can make obtaining a multiple-state green light, as well as ongoing cross-state coordination, challenging.

Her advice to other state DOTs contemplating a similar initiative centered on two themes: education and partnering. Educating the public is important, Beyer said, but perhaps even more critical is internal agency education, especially for two groups: upper management and the maintenance team tasked with actually carrying out the work. As partnering goes, securing early collaboration from groups such as native plants societies, Extension Services, garden clubs and wildlife organizations is key to success. They will all help with the outreach and education of the program as well.

Finally, she urged agencies not to overlook the corporate sector: it definitely needs to be included on agencies’ teams to bring key expertise, networks, and financial support to the table. Partnerships also give others a sense of stewardship in promoting and furthering the program.

“Our organizational structure is such that safety rest areas are managed centrally, making it easier to create a consistent program face. Consistency is important in that it brands the program and makes it more comprehensible and recognizable to the public and staff. Rest areas are also an excellent way for us to educate the public about the new program and the new mowing practices and gardens,” she said.

“Education, both internally and externally is a paramount necessity in a program such as this. You want to make sure everyone comprehends the 'whys' so that support comes forth from a place of knowledge and understanding," said Beyer.

She suggested that education and outreach be an integral part of a similar program, as new techniques and ideas are not always well received when staff and the public are not included in the “whys” and allowed to ask questions.

For more information, link to Virginia DOT’s Pollinator Habitat Program website or contact Diane Beyer, State Vegetation Management Planner, VDOT Maintenance Division, at

[back to top]

NEPA Process

Case Studies: Texas - TxDOT's Traffic Noise Toolkit Helps Streamline Compliance

Highway project developers in Texas responsible for compliance with traffic noise regulations now have a comprehensive collection of documents to turn to for reference, thanks to Texas DOT’s (TxDOT) online Traffic Noise Toolkit. The toolkit contains a dozen documents on topics including traffic noise regulations, compliance with the National Environmental Policy Act (NEPA), compliance with Federal Highway Administration (FHWA) requirements, and instructions for using FHWA’s Traffic Noise Model.

To assist with documentation, the toolkit includes a template letter to local officials about noise contours for land use planning as well as recommended text for documenting traffic noise analyses. And it provides direct links to relevant federal requirements and websites as well as a brochure about traffic noise abatement in both Spanish and English for public outreach.

Texas DOT's Noise Toolkit helps streamline requirements for projects such as this noise barrier in Austin. Photo: Texas DOT

One of a Group

The Traffic Noise Toolkit is one among a group of 17 environmental compliance toolkits developed by TxDOT’s Environmental Affairs Division. Subject matter ranges from air quality to Section 4(f) of the Department of Transportation Act to bicycle and pedestrian accommodation. Each toolkit contains background policy information, general guidance for compliance, procedures, and standards, and a variety of forms for conducting environmental compliance work and recording environmental decisions.

“Our goal in developing the toolkits was to provide a one-stop shop for information pertaining to compliance policy and guidance,” said Ray Umscheid, TxDOT’s Noise Specialist and lead for the Traffic Noise Toolkit. “These types of materials can be difficult enough to understand without having to scavenge the Internet to find them. By having all of the guidance in one location, related materials can clearly be linked and better understood.”

Compliance and the Toolkit’s Origins

Adherence to traffic noise regulations involves compliance with sections of the National Environmental Policy Act (NEPA) as well as the Federal Highway Aid Act. The latter Act mandated that FHWA develop and promulgate procedures to abate highway traffic noise and construction noise. Compliance with these procedures is a prerequisite for granting federal-aid highway funds or FHWA approvals for construction or reconstruction of a roadway. In Texas, regardless of the funding source, all projects must undergo the same process for a noise analysis and ultimately must be approved by TxDOT.

When developing the toolkit, TxDOT determined the contents and developed the draft documents. The documents then were sent to FHWA for input, revised as needed, and posted online. Umscheid said the toolkits already were under way when his agency was granted authority to assume federal NEPA responsibility from FHWA in December 2014. The toolkits will serve TxDOT well as it carries out that role, he added.

Using the Toolkit

“Traffic noise guidelines and modeling methodologies can vary widely from state to state. Because many of the consultants that perform our work are from other states, it is important to have this information readily accessible to facilitate quicker project turn-around,” explained Umscheid.

One of the toolkit’s benefits is that the documentation for complying with FHWA requirements now can be dropped directly into the documentation for complying with relevant portions of NEPA. Before the toolkit was developed, the TxDOT noise guidelines were posted online while there was an overall environmental manual posted elsewhere on the TxDOT intranet site. In the toolkit, the manual has been revised as a noise only manual which references the noise guidelines and the additional supporting documentation, which either didn’t exist or had to be e-mailed to consultants for specific situations.

Umscheid offered specific advice for those using the toolkit. He said there is an inherent hierarchy in the documents posted, with guidance documents having the most detail and therefore being the key documents for ensuring compliance. Next down in the hierarchy come the standard operating procedures documents, which ensure that procedures are performed and documented appropriately. The information posted has been specifically broken out to address the needs of many audiences and users including in-house users, TxDOT district personnel, local governments, and the public.

A substantial portion of the information in the toolkit is “Texas-specific.” FHWA’s Federal Aid Policy Guide 23 CFR 772 gives states considerable discretion on precisely how to abate construction and traffic noise. The Texas-specific information includes TxDOT policy, guidance, and procedures as well as standards for environmental studies and document production. It reflects the fact that TxDOT has several agreements with resource agencies that require certain formats for information submittals, procedures for consultation, and communication protocols.

Recently, said Umscheid, the toolkit was put to particularly good use on a US 290 project in Houston. Consultants were able to access the TxDOT Traffic Noise Model Manual online and use that reference material to help them update an older noise model so that it was consistent with the agency’s modeling methodology for its current projects. In general, the toolkit helps to ensure that all projects are as consistent as possible, that impacts are predicted accurately, and that abatement will be proposed in a similar fashion throughout the state.

Work in Progress

“While the toolkit clearly already has proven its worth, I still view the current version as a starting point… a work in progress,” said Umscheid.

From time to time, he receives feedback from TxDOT Districts and other users in the form of suggestions for additional toolkit components. The latest was a request for a blank letter template intended to inform local officials of noise impact contours. Although the requirement is directed in the federal rule, a consistent, easily accessible template aids in the effort for districts with little noise experience, he said.

In terms of whether other state DOTs can use the Traffic Noise Toolkit as a starting point for their own toolkits, Umscheid reiterated that much of the content is state-specific. However, he suggested that the general format of the kit (and its counterpart kits) may be useful.

The toolkit is continually under development as federal guidance evolves, best practices are incorporated, and questions and issues arise. Because much of the overall guidance is not prescriptive, associated documentation is easy to create and update within that structure.

One example of an anticipated change to the toolkit will be to post an updated Traffic Noise Model manual upon completion of the beta testing of the upcoming model. When available, it will include additional details regarding the modeling barriers for multilevel apartments or other special land uses.

For more information about the toolkit, contact Ray Umscheid, TxDOT Noise Specialist, at, or go to

[back to top]

Planning & Environment Linkages

Recent Developments: Guidebook Issued on Multimodal, Integrated Corridor Management

A guidebook to assist transportation officials with planning and implementing multimodal, integrated corridor management (ICM) approaches has been issued under the National Cooperative Highway Research Program (NCHRP 13-131). ICM uses technology and operational strategies to address recurring and non-recurring congestion and to optimize performance of the transportation infrastructure. ICM promotes interjurisdictional coordination and the use of a broad toolbox of transportation system management and operations strategies to optimally detect, monitor, and respond to events and changing conditions. The guide provides an overview of current recommended practices for the planning, design and development, and operations and maintenance of an ICM system. For more information, including the report, fact sheet, Q&A document, and presentation, link here. (8-14-20)

[back to top]

Recent Developments: NCHRP Issues Guide on Transportation Performance Management

A guide book on setting and achieving transportation performance targets has been issued under the National Cooperative Highway Research Program. The guide book (NCHRP Report 920), provides practical guidance to transportation agencies to help improve their use of data for performance management of safety, pavement, and bridge conditions; transit asset state of good repair; system performance; freight; and mobile source emissions. The guide book is organized around six data life-cycle stages and includes a discussion of what is involved in implementing each step and some of the critical choices to be made. It also provides a framework for assessing current data management practices and a source of ideas for practice improvement. For more information, link to the guide book. (11-5-19)

[back to top]

Recent Developments: FHWA Provides Update on Maine DOT’s Atlantic Salmon Programmatic

The Federal Highway Administration has posted an updated case study on the Maine Department of Transportation’s Atlantic Salmon Programmatic Consultation. Maine DOT reported that its monitoring of completed projects has improved regulatory compliance and ensured beneficial environmental outcomes, while adaptive management has allowed the agency and its partners to incorporate new information to adjust the program to meet efficiency and conservation goals. The in-lieu fee program, which was finalized at the end of 2018, has added flexibility to the programmatic consultation process. For more information, link to the case study. (10-29-19)

[back to top]


Recent Developments: Arizona DOT Reports on Sustainability Accomplishments

The Arizona Department of Transportation has issued an update on its sustainability program and focus areas for 20201. The agency is implementing sustainable strategies in areas of administration, planning, design, construction, operations and maintenance. The report details the agency’s participation in the Federal Highway Administration Infrastructure Voluntary Evaluation Sustainability Tool. Goals for 2021 include increased use of LED lighting, exploring solar energy on ADOT right-of-way, and linking sustainability with the National Environmental Policy Act (NEPA), public involvement, and planning. The agency also is focused on life cycle assessment and life cycle cost analysis. For more information, link to the ADOT sustainability program website. (10-29-20)

[back to top]

Recent Developments: AASHTO Committee on Environment and Sustainability Virtual Meetings Held in October

The 2020 annual meeting of the American Association of State Highway and Transportation Officials Committee on Environment & Sustainability will take place over five virtual sessions in October. CES monitors national trends, promotes research on significant environmental issues, and acts as a forum to disseminate and exchange information and experiences among state departments of transportation and various other AASHTO committees and subcommittees, including the sharing of best practices and other innovations. CES also monitors federal environmental laws, regulations, procedures, and guidance related to air quality, cultural resources, environmental processes, and natural systems and ecological communities; recommending and supporting programs and initiatives to streamline the environmental review process and promote environmental stewardship. To register for these free meeting sessions please click here.

[back to top]

Recent Developments: Minnesota DOT Releases Annual Sustainability Report

The Minnesota Department of Transportation has released its fourth annual Sustainability Report, based on data through 2019. The report documents progress the agency has made toward its sustainability and climate goals. Progress includes reducing energy consumption per square foot by 17 percent between 2008 and 2019; leading a competitive request for proposal for community solar garden subscriptions that will save MnDOT more than $1.5 million and account for almost 25 percent of total agency electricity use; increasing the number of agency electric vehicles from four to 29; and exceeding MnDOT’s goal for reducing salt usage in the 2018-2019 winter season. The report also documented some setbacks, including increased carbon pollution from transportation, use of more fuel in MnDOT vehicles, and use of fewer native seedlings on projects. For more information, link to the announcement and the report. (7-22-20)

[back to top]

Recent Developments: Pilot Projects Will Test New Highway Funding Approaches

The Federal Highway Administration has awarded funding to five states for pilot projects to advance new methods of highway funding. The Surface Transportation System Funding Alternatives grants will fund seven projects in five states. The program’s goal is to test innovative ways to supplement the federal gas tax. The grants will fund projects that test the design, implementation and acceptance of user-based alternative revenue tools, such as a mileage-based fee. States include Delaware, Oregon, Utah, Washington, and Wyoming. For more information, link to the announcement. (7-9-20)

[back to top]

Recent Developments: Study Provides Design Guidelines for Solid-State Roadway Lighting

A design guide for solid-state roadway lighting has been issued under the National Cooperative Highway Research Program. The guide provides a research overview of the current guidance for the use of solid state lighting; identifies the research that still needs to be accomplished to assist in its proper implementation; and develops guidelines based on currently available information and new research. For more information, link to the report. (6-8-20)

[back to top]

Recent Developments: AASHTO Launches Campaign Promoting the Value of Transportation

The American Association of State Highway and Transportation Officials is emphasizing the benefits of transportation investment in a new information campaign. The campaign includes a new website featuring the economic and quality-of-life benefits of transportation, along with a state-by-state collection of examples of transportation projects providing value to their communities. The campaign also includes a report covering selected projects that state transportation departments have done, demonstrating the connection between transportation investment and community benefits. For more information, link to the website. (3/2/20)

[back to top]

Recent Developments: Study Reviews Impact of Emerging Technologies on Transportation

The effects of new transportation-related technologies on public agencies is the subject of new research issued under the National Cooperative Highway Research Program (NCHRP Research Report 924). The research evaluated the potential impacts of transformational technologies, including wireless telecommunications, shared vehicles, connected vehicles, fully autonomous vehicles, alternative fuel vehicles, smart cities and communities, big data analytics, and the internet-of-things. The report includes background information, provides a desk reference that describes various technologies, and discusses technologies’ impacts on transportation agencies. For more information, link to the research report. (2-6-20)

[back to top]

Recent Developments: ASCE Launches Future Vision for Infrastructure

The American Society of Civil Engineers has launched a vision project regarding the future of infrastructure. The project includes a report, a recent article, and an interactive website that map out key trends and the potential outcomes of alternative energy, autonomous vehicles, climate change, smart city technologies, advanced materials, and governmental policy and funding. The project also reviews a range of possible future scenarios, including resilient cities, progressive megacities, dispersed settlements, and the potential for inequity in future technological development. For more information, link to the Future World Vision website. (11-5-19)

[back to top]

Recent Developments: Report Highlights Use of 'Big Data' for Traffic Incidents

A report that documents the use of “big data” to improve traffic incident management has been issued under the National Cooperative Highway Research Program (NCHRP Report 904). Big data uses in transportation include applications in the areas of planning, parking, trucking, public transportation, operations, and intelligent transportation systems. The report finds that use of big data “represents a radical change from traditional approaches—a complete paradigm shift—and many of the benefits of Big Data analytics will require aggregating data at least at the state level, if not at the national level.” The ability to merge datasets and mine the data could provide significant opportunities to advance the state of the practice in traffic incident management policies, it said. For more information, link to the report. (10-15-19)

[back to top]

Recent Developments: NCHRP Reviews Impacts of New Technologies on Transportation, Land Use

The impacts of changes on regional economic activity and land use initiated by newer technologies has been analyzed in a report issued under the National Cooperative Highway Research Program. The report, NCHRP Research Report 924: Foreseeing the Impact of Transformational Technologies on Land Use and Transportation, discusses the ways in which transportation agencies need to rethink how policies and plans are developed and the types of expertise they need to obtain. Technologies that could impact land use include wireless telecommunications, shared vehicles, connected and autonomous vehicles, alternative-fuel vehicles, smart cities and communities, big data analytics, and others. For more information, link to a pre-publication draft of the report. (9-25-19)

[back to top]

Recent Developments: Group Issues Report on States With the Most Cost-Efficient Highways

The Reason Foundation has issued a report that ranks states based on the cost-effectiveness of their highway networks. The report says that North Dakota, Virginia, Missouri, Maine, and Kentucky are the five states with the highest overall highway performance ratings. The rankings were based on several factors including the amount of disbursements, pavement conditions, urban congestion, bridge conditions, and road fatalities. Disbursements relative to state-controlled lane miles provides a cost per mile of state infrastructure. For more information, link to the report. (9-3-19)

[back to top]

Recent Developments: NCHRP Review of Motor Vehicle Laws to Address Automated Vehicles

A report on the implications of connected and automated vehicles on state motor vehicle laws has been issued under the National Cooperative Highway Research Program (NCHRP 20-102, Task 07). The report provides a review of state laws and regulations that may need to be reconsidered in light of the fact that, with connected and automated vehicles, drivers may not always be maintaining continuous involvement in the driving task or be fully responsible for managing traffic safety hazards. The report also identifies possible barriers to implementation and addresses processes and stages for modifying relevant vehicle codes. For more information, link to the report. (7-8-19)

[back to top]

Recent Developments: Report Describes TRB ‘Mobility on Demand’ Workshop

The latest information and trends related to mobility on demand (MOD) services and technologies are described in a summary of a workshop held as part of the Transportation Research Board’s annual meeting in January 2019. MOD allows consumers to access travel and goods delivery services on demand by dispatching or using public transportation, shared mobility, courier services, urban air mobility, and other innovative and emerging technologies. The report provides an overview of the workshop, including recent trends, results from demonstration projects and development of a research agenda on the topic. For more information, link to the TRB circular. (5-25-19)

[back to top]

Recent Developments: FHWA Announces Environmental Excellence Award Recipients

The Federal Highway Administration has announced the 2019 recipients of its biennial Environmental Excellence Awards. The awards recognize partners, projects, and processes that use Federal Highway Administration funding sources to go beyond environmental compliance and achieve environmental excellence. For more information, including the 12 recipients, link to the 2019 Environmental Excellence Awards web page. (7-1-19)

[back to top]

Recent Developments: Webinar Highlights Effective Complete Streets Policies

An overview of the 10 best complete streets policies of 2018 was provided in a May 21, 2019, webinar sponsored by Smart Growth America. The top policies, announced in a report issued by the National Complete Streets Coalition, included communities in Alabama, Connecticut, Florida, Iowa, Maryland, Massachusetts, Ohio, and Wisconsin. A complete streets approach integrates people and place in the planning, design, construction, operation, and maintenance of transportation networks. This helps to ensure streets are safe for people of all ages and abilities, balance the needs of different modes, and support local land uses, economies, cultures, and natural environments. For more information on the selected policies, link to the report and the webinar. (5-29-19)

[back to top]

Recent Developments: Best Practices to Manage Mobility Data Issued by NACTO

Methods to help cities better access and manage mobility data are described in policy guidance issued by the National Association of City Transportation Officials. The report, Managing Mobility Data, provides a common framework for sharing, protecting, and managing data based on four principles: data is a public good; data should be protected; data should be collected purposefully; and data should be portable. It provides guidance on how to ensure individual privacy as data collection becomes easier and more widespread. For more information, link to the report. (5-30-19)

[back to top]

Recent Developments: Report Highlights Transportation in the Age of Artificial Intelligence

A report from the U.S. DOT’s Volpe Center highlights findings from a thought leadership series, Transportation in the Age of Artificial Intelligence and Predictive Analytics, held from June to October 2018. The series convened experts in government innovation, vehicle automation, and logistics to consider the promise and potential of recent breakthroughs in machine learning and data analysis. These experts shared their visions for how new technologies can be applied throughout the transportation enterprise—such as data from mapping applications that can improve traffic modeling and save lives on U.S. roads. For more information, link to the report. (1-29-19)

[back to top]

Recent Developments: Report Evaluates Issues Regarding Dedicated Lanes for Automated Cars

A report evaluating opportunities, constraints, and guiding principles for implementing dedicated lanes for connected and automated vehicles (CAVs) has been issued under the National Cooperative Highway Research Program. NCHRP Report 891: Dedicating Lanes for Priority or Exclusive Use by Connected and Automated Vehicles, describes the intended benefits when dedicating lanes for the exclusive use of CAVs in terms of safety, mobility, social concerns, and the environment. It also describes the conditions that would support dedicating lanes for priority and exclusive use of vehicles equipped with cooperative adaptive cruise control and dynamic speed harmonization, and provides a review of laws and regulations regarding dedicating lanes. The analysis, based on computer-based models, helps identify potential impacts associated with various conditions affecting lane dedication, market penetration, evolving technology, and changing demand. For more information, link to the report. (1-11-19)

[back to top]

Case Studies: Arizona - Arizona DOT Champions Sustainability Using INVEST Tool

The Arizona Department of Transportation (ADOT) is using a self-evaluation tool to assess and improve its projects and programs, helping the agency integrate sustainability into virtually every component of the transportation lifecycle, including planning, design, construction, operations, and maintenance activities.

Over the last several years, ADOT increasingly has recognized the importance of delivering transportation solutions in a more sustainable manner to achieve economic, social, and environmental goals.

“After three years of progress, our Sustainable Transportation Program has reached every corner of the agency,” said Steven Olmsted with ADOT’s Office of Environmental Planning. “It has become our standard way of carrying out our work and is bringing multiple benefits.”

Arizona DOT’s Sustainable Transportation Program has implemented solutions such this roundabout on US 89. Photo: Arizona DOT

History and Program Structure

The roots of ADOT’s sustainability program extend back to 2012 when the agency published two planning documents that both called for sustainability to be a key objective. At that time, it also was adding sustainable land use and urban planning into its Multimodal Planning Division, and beta testing the Federal Highway Administration’s (FHWA) Infrastructure Voluntary Evaluation Sustainability Tool (INVEST).

In 2013, ADOT began incorporating sustainable practices into its project development and construction activities, “cherry-picking” successes and bringing them to the attention of managers to build internal support. For example, by addressing the storm water run-off component of a pavement project during construction, project managers could point out that heavy rains otherwise would have shortened the lifespan of the pavement an added to maintenance costs.

ADOT’s Sustainable Transportation Program was formalized in 2014 and is housed in the Environmental Planning Office, with management and oversight remaining largely centralized. Olmsted described the method as a “bottom up approach.” Since that time, the program has been working through designated milestones to ensure consistent adoption across a balance of disciplines. These have included an ADOT Resilience Program and ADOT’s 2016 Complete Transportation Handbook, which is a foundational resource to guide sustainable project development efforts. The handbook includes a set of strategies and tools to improve transportation system sustainability.

ADOT’s Administrative Services Division is the most recent agency component to be placed under the sustainability program lens. Draft policies are being developed for practices such as fuel efficiency, office recycling, and commuting, and are expected to become standard policy in 2017. Meanwhile, the agency continues to incorporate and assess best management practices for achieving sustainability in every component of the transportation lifecycle. For instance, INVEST has been used to assess the effectiveness of mobile onsite batch plants for cement production in sensitive eco-regions of the state.

Operational Focus Areas

To frame ADOT’s sustainability program for the year ahead, a roadmap containing several dozen “Operational Focus Areas” is agreed upon annually that span the agency’s work: planning, project development, operations, maintenance, and administrative activities. For 2016, focus areas included activities such as:

  • sustainable outreach to Arizona tribes,
  • upgrading the heavy equipment idling policy,
  • developing a reuse policy for millings, and
  • assisting the Transportation Research Board (TRB) in framing global sustainable transport.

Efforts also include stand-alone projects such as the Black and Green Sustainable Pavement Pilot Program. Sustainable pavement management enhances roadway safety and optimizes pavement life cycles to reduce costs, while also considering the environmental impacts of construction and material usage. Other projects are on the drawing board, including efforts related to clean energy and sustainable freight.

In addition, ADOT plans to publish a progress report on the three framework components of its FHWA Climate Resilience Pilot Project: storm water, extreme weather, and downscaling of climate data as it relates to transportation systems.

Evaluating Performance Using INVEST

ADOT has advanced its sustainability efforts in large part by pioneering the FHWA’s INVEST sustainability tool. FHWA developed INVEST to help transportation agencies incorporate the “triple bottom line” objectives of environmental, economic, and social sustainability into their programs and projects. Web-based INVEST includes four independent modules: Systems Planning for States, Systems Planning for Regions, Project Development, and Operations and Maintenance.

Using INVEST modules, agencies can self-score how well they have achieved specific sustainability goals by measuring their work against carefully chosen best practice “criteria.” Each criterion has been selected because it links to one or more components of the “triple bottom line.” For example, one criterion included in the Project Development module is ecological connectivity, while the Operations and Maintenance module includes an electrical energy efficiency criterion. In total, INVEST incorporates 81 criteria spread across the four modules.

ADOT has played a key role in the evolution of INVEST. In 2011 it participated in the INVEST Version 1.0 beta-test program. Then in 2013 and 2014, it implemented the PD module, and in 2015 and 2016 it scored and adopted the OM module. Also during 2016, it assisted with developing INVEST Version 1.2 and issued its 2nd Annual Sustainable Transportation Program Report which included the Arizona DOT Sustainability Implementation Report. Being a pilot test agency for the modules gave his agency an early lead in leveraging INVEST’s capabilities to make major strides forward in its own internal sustainability work, said Olmsted.

“We use INVEST to measure, plan, discuss, and improve,” he said. “It is a shortcut for arriving at what the current FHWA sustainable universe encompasses and helps us do more with less.”

Putting INVEST to Work

ADOT already has put INVEST to good use. In 2015, it scored 50 projects in the agency’s five-year construction program using the Project Development Module, with an initial specific focus on statewide roundabout projects. ADOT then expanded the scoring from roundabouts to projects ranging from pavement preservation to bridge deck rehabilitation to new lane miles. It was particularly interested in how green infrastructure, low-impact development, multimodal mobility, freight and Context Sensitive Solutions can be measured and defined.

Out of the projects scored, two were rated gold (50 percent of total possible points), 9 were rated silver (40 percent of total possible points), and 20 were rated bronze (30 percent of total possible points).

In 2016, ADOT’s INVEST scoring focus centered on the agency’s operations and maintenance efforts The agency received an independently scored 142 points out of a possible 210, sufficient to achieve INVEST’s highest platinum rating.

ADOT also has harnessed INVEST’s capabilities to help meet NEPA requirements. For example, the agency applied INVEST as a scoring tool for design alternatives and a public outreach tool for two Environmental Impact Statements by requesting comment during the scoping period.

Challenges Encountered

Selling the concept of sustainability inside a traditional road-building agency can be challenging, Olmsted said. And working with a self-scoring tool such as INVEST initially may be met with resistance from some managers. But by maintaining the focus on exchange of information, and with a potential to highlight successes as well as areas for improvement, managers usually transition from initial skepticism to active involvement in sustainability discussions.

Another challenge is that precise financial benefits are difficult to quantify. Comprehensive sustainable transportation is still in its infancy without the benefit of cost-benefit analysis and return on investment statistics.

Advice for DOTs

For other state DOTs interested in developing a comprehensive sustainable transportation program, Olmsted offered the following guidance:

  • Identify an internal senior-level champion early in the process.
  • Work closely with FHWA staff, who are extremely knowledgeable.
  • Be prepared to invest considerable time and effort to make the program viable.
  • Incorporate an awards program such as ADOT’s Excellence in Advancing Sustainable Project Development Award Program.
  • Carry out training on how to use INVEST for continuous improvement, and make its use a standard operating procedure.

Training on using INVEST is crucial, said Olmstead. In 2014 and 2015, his agency carried out classroom training on INVEST and also trained several local public agencies. During 2016, most sustainability training took place by having the training team “embed themselves” with individuals in their offices. In the coming years, the agency plans to continue classroom training classes as well as sponsor larger state-wide training sessions.

For more information about ADOT’s sustainable transportation program and use of INVEST, access the ADOT Sustainable Transportation Program web page or contact Steven Olmsted, ADOT Office of Environmental Planning at

[back to top]

Case Studies: District of Columbia - District of Columbia DOT Advances Sustainable Practices Department-Wide

Environmental stewardship and sustainability efforts in the nation’s capital are continuing to advance, with the District of Columbia Department of Transportation’s (DDOT) implementation of a sustainability plan and a range of sustainable practices for the department.

DDOT’s Sustainability Plan incorporates and integrates sustainable practices throughout the department’s work, according to Faisal Hameed, Chief of the Project Development, Environment, and Sustainability Division at DDOT. The agency has established measures and targets that will be revised regularly so that DDOT can track and improve its environmental performance and increase the sustainability of the city’s transportation projects and programs.

Environmental, Social, Economic Goals

DDOT’s Sustainability Plan reflects the “triple bottom line” approach to sustainability, targeting environmental quality, social structure, and the economy.

DDOT defines a sustainable transportation as “a transportation system that provides its users with various mode choices in a balanced manner without compromising their safety, accessibility, and mobility while supporting the economy, promoting livability and protecting the environment.”

The plan identifies eight priority areas for sustainability and establishes goals, actions, measures, and targets for each. The priority areas and goals are:

  • Promoting transportation and land use linkage
  • Improving mode choices, accessibility and mobility
  • Effective cost assessments in decision-making
  • Supporting the economy
  • Improving DDOT operations and project development processes
  • Protecting the environment and conserving resources
  • Climate change adaptation
  • Promoting livability and safety

For each priority area, measures and targets are identified, such as reduction of annual greenhouse gas emissions from DDOT projects by 5 percent annually. DDOT will track each area and report annually on progress made in achieving the targets.

Sustainable Initiatives and Projects Underway

Examples of sustainable efforts include DDOT’s “Great Streets” initiative, with efforts such as the Nannie Helen Burroughs Avenue project, which won one of the first grants from the Environmental Protection Agency (EPA) under its Green Highways Partnership. DDOT employees successfully worked with EPA, the Federal Highway Administration, District Department of Environment, National Park Service, and other agency partners and the community to develop a sustainable design that improves bicycle and pedestrian safety by adding bike lanes, enhancing sidewalks, and incorporating low impact development (LID) features. Project features include bioretention areas, stormwater planters, and permeable concrete sidewalks, all of which help treat stormwater and reduce runoff into local waterways.

DDOT’s work to develop a Climate Change Adaptation Plan is another key sustainability effort. The plan will focus on developing a framework of recommendations for adapting to impacts brought on by a changing climate, especially as they relate to transportation infrastructure. DDOT has conducted workshops with the Federal Highway Administration, EPA, AASHTO, Metropolitan Washington Area Council of Governments, District Department of Environment, and various other agencies to develop this framework.

DDOT also is emerging as a national leader in bike-sharing and bicycle improvement programs, spearheaded by DDOT’s Bicycle and Pedestrian Program Manager. Over 100 bike-share stations have been installed in the city and several more are planned.

Another example is the Klingle Valley Trail project, which will address historic flooding that caused erosion of a stream and road in Rock Creek Park. Working through an interagency partnership focused on a watershed approach to mitigation, DDOT will replace the existing storm-damaged roadway with a 10-foot-wide permeable-surface multi-use trail, use LID techniques and build a consistent bioswale parallel to the trail, and conduct innovative full stream channel restoration and bank stabilization for Klingle Creek.

In addition, historic preservation goals were achieved in a sustainable manner in the reconstruction and restoration of O and P Streets in the Georgetown National Historic District.

Restoration of one and a half miles of the roadway required the excavation of more than 300,000 granite pavers and removal of historic trolley tracks. After inspecting each granite paver, more than 90 percent of the original stones were reused. Each was power washed and placed one-by-one into the new roadway base. The trolley tracks and underground appurtenances were refurbished and returned to their original locations. At the same time, the 19th century water mains were replaced. DDOT employees led the complex design and construction of the roadway features while maintaining traffic and access for residents in a street that consists of all historic houses.

Other successful efforts include DDOT’s Green Alley pilot program to demonstrate use of permeable pavement and other low impact development techniques in alleys throughout D.C., as well as the city’s LED street lights programs.

EMS Advances Sustainability

In support of its sustainability efforts, DDOT also is implementing an environmental management system (EMS), based on the International Standards Organization (ISO 14001) structure. The agency may seek ISO certification in the future, Hameed said. The EMS is being implemented in phases. As the first phase, DDOT focused on the project development and environmental review process as well as office operations.

Following the “plan-do-check-act” EMS model, DDOT’s EMS outlines the agency’s environmental policy and describes objectives, measures, and targets as well as roles and responsibilities for implementation, measuring and reporting progress, and ensuring continuous improvement.

For project development and environmental review, the plan applies to all phases of project development, including planning, preliminary engineering, environmental review, final design, construction and maintenance. It calls for incorporation of environmental features in DDOT projects and increased use of beneficial and recycled materials.

For example, under the plan, projects will set a goal to achieve a 5 percent decrease in overall emissions as well as a 5 percent decrease in greenhouse gas emissions, and at least half of all projects will include environmental components such as low impact development features and tree planting.

In addition, measures and targets are included to help streamline environmental reviews by reducing delays from environmental issues, avoiding delays in obtaining permits, and fulfilling environmental commitments on projects.

As part of the EMS implementation, environmental audits will be conducted at every phase of the project development process, and environmental commitments and mitigation will be tracked to ensure that the commitments are carried through to design and construction. The results of the reviews will be documented in an annual report, including recommendations for corrective actions.

“The idea is to monitor and evaluate environmental considerations throughout the project development process,” Hameed said. Forms must be filled out when a project is initiated, he said, and based on that form, determinations are made regarding potential environmental impacts and mitigation. That form is reviewed and approved by the Project Development, Environment, and Sustainability Division to ensure commitments are carried out.

For more information, link to the DDOT Sustainability Plan.

[back to top]

Case Studies: Illinois - Illinois - Livable and Sustainable Transportation Rating System and Guide (I-LAST)

Transportation design and construction groups in Illinois have helped to design a voluntary guide intended to encourage use of sustainable practices for the transportation projects in the state. The Illinois - Livable and Sustainable Transportation Rating System and Guide (I-LAST), issued in January 2010, was developed in a cooperative effort between the Illinois Department of Transportation, the American Council of Engineering Companies–Illinois (ACEC-Illinois), and the Illinois Road and Transportation Builders Association (IRTBA). The guide – which is voluntary and “advisory in nature” – provides a description of sustainability in transportation and provides a tool for identifying and documenting sustainable practices on highway projects in the state.

The purpose of the guide is to:

  • provide a comprehensive list of practices that have the potential to bring sustainable results to highway projects;
  • establish a simple and efficient method of evaluating transportation projects with respect to livability, sustainability, and effect on the natural environment; and
  • record and recognize the use of sustainable practices in the transportation industry.

The I-LAST guide identifies the following goals of providing sustainable features in the design and construction of highway projects:

  • Minimize impacts to environmental resources
  • Minimize consumption of material resources
  • Minimize energy consumption
  • Preserve or enhance the historic, scenic and aesthetic context of a highway project
  • Integrate highway projects into the community in a way that helps to preserve and enhance community life
  • Encourage community involvement in the transportation planning process
  • Encourage integration of non-motorized means of transportation into a highway project
  • Find a balance between what is important: to the transportation function of the facility, to the community to the natural environment, and is economically sound,
  • Encourage the use of new and innovative approaches in achieving these goals.

The guide includes a checklist-based scorecard for evaluating the sustainable practices included in a highway project, with 17 separate sustainable features in eight categories:

  • Planning: context sensitive solutions, land use /community planning;
  • Design: alignment selection, context sensitive design;
  • Environmental: protect, enhance or restore wildlife communities; protect, enhance, restore native plant communities; noise abatement;
  • Water: reduce impervious area; stormwater treatment; construction practices to protect water quality;
  • Transportation: traffic operations, transit, improve bicycle and pedestrian facilities;
  • Lighting: reduced electrical consumption, stray light reduction;
  • Materials; and
  • Innovation.

For each of the 17 features, the scorecard lists activities and available points that could be earned for each activity included on a project. It also provides an explanation and resources to help users better understand how to implement each of the sustainable features.

The effort started with a desire to be more proactive on sustainability and was inspired by the GreenLITES approach developed by New York State DOT (see related case study). Industry partners worked with Illinois DOT to tailor their own system, agreeing that it would be used only on a voluntary basis. There is currently no certification or other incentive for the project scoring system, but such an approach may be added in the future.

While the I-LAST approach is voluntary, District 1 already has begun using the approach. The sustainable actions listed in the guide are already being done on many projects, but it is expected to bring awareness and encourage sustainable practices. While officials say they do not foresee a statewide mandate for the approach, it is expected to raise awareness of the types of practices that can be done.

The extent to which the Illinois guide takes hold also may be influenced by a sustainability tool currently under development by the Federal Highway Administration. The agency is in the process of developing its own rating system to provide criteria for sustainable practices.

For more information on the Illinois approach, link to the Illinois - Livable and Sustainable Transportation Rating System and Guide (I-LAST).

[back to top]

Case Studies: New York - GreenLITES Certification Offers Incentive for Sustainable Practices

New York State Department of Transportation is pioneering an effort to measure its own performance on sustainability and is also creating a powerful incentive for its employees to go green. NYSDOT’s Green Leadership in Transportation and Environmental Sustainability (GreenLITES) program, launched in September 2008 and continuing to evolve, is a certification program that recognizes projects and operations that incorporate sustainable practices. The more green practices performed, the higher the certification level that can be achieved.

The first program of its kind in the nation used to rate all DOT projects, GreenLITES is modeled after the building industry’s Leadership in Energy and Environmental Design (LEED) certification program for green building practices and the University of Washington’s Greenroads program. GreenLITES applies a similar approach to recognize and encourage environmentally sustainable practices in transportation. The GreenLITES rating system tracks specific sustainable practices and awards credits based on the degree to which such practices are implemented. The system recognizes varying certification levels, with the highest level going to those efforts that go above and beyond standard practice and “clearly advance the state of sustainable transportation solutions.” Depending on the cumulative score acquired by incorporating sustainable choices into project design or operations, one of the following GreenLITES certification levels may be assigned:

  • Certified: Certification is awarded for incorporation of a number of sustainable choices.
  • Silver: Silver certification is awarded for incorporation of a number of sustainable choices with several of these choices having a high level of impact, or having advanced the state of practice.
  • Gold: Gold certification is awarded for incorporation of a substantial number of sustainable choices with many of these choices having a high level of impact, or having advanced the state of practice.
  • Evergreen: Evergreen certification is awarded for incorporation of the highest number of sustainable choices with many of these choices having an extremely high level of impact. Additionally, these efforts may advance the state of practice or are innovative in the way environmental sustainability is approached.

Scoring Projects and Operations
For Project Design, each project is tracked on a “scorecard” that lists and scores more than 170 practices in categories including sustainable sites, water quality, materials and resources, energy and atmosphere, and additional innovations and other actions. For each category, a list of activities is provided along with the number of credits that may be earned.

Because of the different nature of its work, the Operations Program takes a slightly different approach, incorporating GreenLITES sustainability measures into its existing annual maintenance and operations planning process. The long list of 130 operations and maintenance practices includes GreenLITES measures and other “green” practices available for credits in the following general categories:

  • Bridges
  • Drainage
  • Snow and Ice
  • Intelligent Transportation Systems (ITS)
  • Guiderail & Fencing
  • Signs
  • Walls and Rock Slopes
  • Multimodal & ADA
  • Pavement
  • Signals & Lighting
  • Facilities
  • Roadside Environmental
  • Markings
  • Fleet Administration
  • Communications Technology & Emergency Preparedness
  • Other

The scoring is conducted each year at the end of March at the close of NYSDOT’s fiscal year. For both Operations and Project Design, the Department presents Evergreen and Gold awards each April on Earth Day.

The program has been implemented in stages, starting with the September 2008 GreenLITES Project Design Program, followed by the April 2009 GreenLITES Maintenance/Operations Plan Spreadsheet, the March 2010 Regional Sustainability Assessment tool and the Planning, Project Solicitation tool. The Department has also launched a Local Projects Certification Program that allows other state agencies, authorities, municipalities, and non-governmental organizations to use the GreenLITES project design tool.

The GreenLITES project design tool and operations tool have proved to be good for evaluating projects that are part of an existing construction or maintenance program. However, the Department also needed a way to select the “right projects.” This led to the development of the 2010 Project Solicitation Tool and the Regional Sustainability Assessment Table.

The project solicitation tool is a questionnaire that helps determine how closely a project is consistent with seven identified sustainability goals. Points are awarded for each goal criterion in the proposed project. Project scores may then be used as a discussion point when deciding what projects to include in long-term capital program submissions.

The Regional Sustainability Assessment Table is used by NYSDOT regions to develop and assess regional long-term sustainability goals from a more holistic perspective, across program areas and using the triple bottom line realms of economy, environment and communities. The table is used to identify current states, desired future states, and plans for accomplishing future states in all three sustainability realms as they relate to specific NYSDOT goals.

All these tools are continually being updated and refined. For example, the Department is currently using the 2.1.0 project design scorecard, and after each round of operations awards the operations plan spreadsheet is updated. Also, NYSDOT is currently working on how to better integrate sustainability into the Department’s asset management and program update processes.

“The Department of Transportation is more than concrete, asphalt and steel. We are, in fact, a vital connection to and part of the path toward economic recovery,” NYSDOT Commissioner Joan McDonald said in announcing the 2011 awards. “As we plan for the future, our transportation investments must be done in a manner that is both environmentally sensitive and sustainable. GreenLITES is the Department’s nationally recognized program which keeps us focused on making transportation decisions that support a sustainable society.”

For more information, link to NYSDOT’s GreenLITES website, which includes links for the Project Design Certification, Operations Certification Program, GreenLITES Regions, Local Projects Certification, GreenLITES Planning, and links to awards. Information also may be obtained by contacting the program staff via e-mail at

[back to top]

Case Studies: Oregon - Oregon DOT Advances Sustainability Planning, Practices

A pioneer in sustainable transportation, the Oregon Department of Transportation (ODOT) was the first state transportation agency to adopt an agency-wide sustainability plan. Issued in 2004, that plan stressed inclusion of sustainability considerations in the update of the Oregon Transportation Plan, implementation of a sustainable bridge delivery program (OTIA III), and development of an environmental management system for ODOT’s maintenance yards.

In 2008, ODOT embarked on a broader three-volume sustainability plan aimed at addressing both internal and external operations in seven focus areas: health and safety; social responsibility/workforce well-being and development; environmental stewardship; land use and infrastructure; energy/fuel use and climate change; material resource flows; and economic health. Volume I of the plan, issued in 2008, provides the vision and framework for ODOT’s sustainability goals and strategies.

Volume II of the Sustainability Plan, completed in 2010, sets goals, strategies, and performance measures for ODOT’s internal operations, such as its facilities and fleet. It includes goals such as increasing use of alternative fuels and electric vehicles in the ODOT fleet, reducing the amount of waste generated by facilities, and decreasing greenhouse gas emissions from overall agency operations.

Volume III of the plan, which has not yet been completed, will address goals and strategies for management and operation of the statewide transportation system. This will include sustainable practices in project delivery, highway design and construction, and identification of the best tools to manage and implement sustainability within individual projects.

Annual Sustainability Report

The long list of sustainable practices and programs overseen by ODOT’s Sustainability Program Manager and the cross-discipline ODOT Sustainability Council are documented in an annual sustainability progress report. Some examples include installation of electric vehicle charging stations, purchase of electric vehicles, increased use of alternative fuels such as biodiesel for the ODOT fleet, and installation of solar panels on ODOT right-of-ways for the first-ever “Solar Highway” projects.

ODOT also considers sustainability in project decision-making. The Columbia River Crossing Project – a joint effort of the Oregon and Washington DOTs – was the first in the nation to include a project-level sustainability plan. Sustainability goals for the project are to be achieved through a long list of project elements, including addition of high capacity transit, reducing vehicle miles traveled, use of tolling, electronic safety technologies, bicycle and pedestrian facilities, and use of sustainable construction materials and methods.

ODOT also is working with its sister agency, the Department of Land Conservation and Development, to implement the Oregon Sustainable Transportation Initiative (OSTI), an integrated statewide effort to reduce greenhouse gas emissions from the transportation sector while creating healthier, more livable communities and greater economic opportunity.

ODOT Supports Electric Vehicle Infrastructure. Photo: Oregon DOT

Sharing Sustainable Practices

A wide range of programs and projects underway are documented on ODOT’s Sustainability Program Website, including a “sustainability news” section with articles describing recent efforts.

For more information on ODOT’s sustainability programs, visit the ODOT Sustainability Program web page, or contact ODOT Sustainability Program Manager Marjorie Bradway,

[back to top]

Case Studies: Rhode Island - Rhode Island DOT Targets Stormwater Pollution through Public Education, Outreach

The Rhode Island Department of Transportation (RIDOT) has taken a leadership role in achieving sustainable solutions to manage stormwater through a unique statewide outreach and education initiative.

The “Stormwater Solutions” initiative, funded by RIDOT with a grant from the Federal Highway Administration, supports implementation of the new state-level stormwater regulations as well as RIDOT’s ongoing compliance with the federal Municipal Separate Storm Sewer Systems (MS4) program.

The purpose of Stormwater Solutions is to:

  • conduct a statewide campaign to raise public awareness of the stormwater problem and actions individuals can take to prevent stormwater pollution;
  • develop consistent educational materials and outreach methods that municipalities, state agencies, and community organizations can use to empower citizens, businesses, and builders to solve local stormwater problems;
  • provide model ordinances for local stormwater management with related training; and
  • train government staff, local officials, and others in updated stormwater management practices.

State regulations call for incorporating Low Impact Development (LID) as the “industry standard” for development. LID is an approach to land development that works with nature to manage stormwater that runs off impervious surfaces as close to its source as possible and treats it as a resource rather than a waste product. It reduces the impact of built areas and promotes natural movement of water within an ecosystem.

By proactively integrating LID and sustainable practices into a comprehensive outreach and education program, the Stormwater Solutions initiative is finding sustainable ways to protect the environment, save money, achieve regulatory goals, and build public support for sustainable transportation infrastructure.

The initiative is being implemented in partnership with Rhode Island Department of Environmental Management (RIDEM); the University of Rhode Island (URI) Cooperative Extension’s Nonpoint Education for Municipal Officials program; and the Southern Rhode Island Conservation District. As part of the initiative, a team of professionals from these organizations is developing materials to educate and inform towns, cities, and the general public across the state about compliance with the new stormwater regulations.

Training Programs to Prevent Runoff

Through the Stormwater Solutions outreach effort, more than two dozen training workshops for RIDOT and municipal employees have been completed. The training has addressed new ways to prevent runoff pollution at public works garages and construction sites; the inclusion of improved pollution controls in new project designs, construction practice, and routine maintenance; and designing for “green streets“ and ways communities can make a difference in preventing stormwater pollution.

RIDOT is also integrating LID techniques in new project designs. An early example of this integration is the reconstruction of Route 138 in South Kingstown. LID techniques will convey stormwater away from the road through grassed swales instead of standard piping and inlets, saving construction costs, improving water quality, and enhancing the road’s appearance. The project also includes a landscaped bio-retention feature in a roundabout to provide water quality treatment and to infiltrate stormwater into the ground.

Community Outreach

Stormwater Solutions is working to reduce impacts to stormwater at the source by conducting community outreach to educate the public and municipal officials on the importance of pollution prevention and applying environmentally sustainable and cost saving LID techniques. These source reduction activities – which include everyday actions such as reduced use of fertilizer, litter control, hazardous material control, and use of ground infiltration and bio-swales to filter pollutants – reduce the need to build and maintain expensive treatment structures and provide opportunities for creating greener, more visually attractive landscapes along roadsides.

Stormwater Solutions offers easy-to-use materials for public education and outreach to inform communities about ways they can help manage stormwater runoff. The materials – which are publicly available on a website – are designed for use by municipalities, stormwater managers, watershed organizations, or interested civic groups.

Illustration of Combined Sewer Overflow from Stormwater Fact Sheet: Source:

For example, the website provides a series of fact sheets on various aspects of stormwater management:

  • Where Does It Come From, Where Does It Go?
  • Where Do I Fit In?
  • What Do You Do With Household Chemicals?
  • How Healthy Is Your Septic System?
  • Is Your Lawn Care Stormwater-Friendly?
  • Is Your Yard A Sponge?
  • Do You Scoop the Poop?
  • Making Auto Care Stormwater-Friendly
  • Involving Your Neighbors in Storm Drain Marking
  • Promoting Stormwater-Friendly Yard Care in Your Neighborhood
  • Promoting Responsible Pet Waste Disposal in Your Neighborhood
  • Involving Local Businesses in Stormwater Management

A variety of other outreach materials also are provided, including cartoons, articles, display materials, radio spots, videos, and stormwater training manuals. The website also provides a variety of strategies, examples from towns in the state, and an inventory of LID practices such as bio-swales, green roofs, cisterns, permeable pavement, rain gardens, and site design.

Next Steps

Allison Hamel, Environmental Scientist/Stormwater Program Coordinator with RIDOT, said the agency is working with DEM and URI to develop a second five-year agreement for public education and outreach. The second agreement will focus on:

  • training in use of a new Erosion & Sedimentation Control Handbook (currently under revision) for a variety of audiences, particularly field inspectors;
  • exploring greater focus on hands-on training to actively assist MS4s in managing local storm drain systems;
  • customizing assistance to meet local needs based on stormwater managers existing resources and their priorities;
  • targeting training/workshops/workgroups on priority areas such as high quality Special Resource Protection Waters (SRPWs) and restoration of impaired waters with total maximum daily loads (TMDLs); and
  • state and local permitting issues and implementation of the RI Stormwater Design and Installation Standards Manual, with emphasis on implementing LID at the local level and permitting in priority areas such as high quality SRPWs and restoration of impaired waters with TMDLs.

Transferability and Lessons Learned

Hamel said other state DOTs could benefit from efforts similar to the Stormwater Solutions program.

“We think that this would most definitely be transferable to other DOTs, particularly in other states where the DOT is the only state-wide MS4,” she said.

“Not only did RIDOT receive full compliance ‘credit’ for Minimum Measure 1 & 2 (except for the public notice part) from the state regulatory agency (RIDEM), RIDOT staff received personalized training that we would not have received otherwise (i.e. the linear LID training),” she added.

Hamel also stressed the importance of training. “One of our greatest lessons learned was that the ‘train the trainer’ workshops provided great resources, but those resources were rarely used and implemented once the ‘trainer’ got back to work.”

“This is one of the reasons why we are focusing on the hands-on training in the second agreement,” she said.

Hamel also noted the importance of training not only for staff, but also for upper-level management, that is, “those with decision-making capabilities and money-wielding powers.”

“It is important that managers and the directors recognize the money and assets and resources that stormwater management truly needs,” she added.

More information is available on the Stormwater Solutions website, at and by contacting RIDOT’s Allison Hamel at

[back to top]

Transportation Reauthorization

Recent Developments: FAQ Document Addresses Transportation Performance Management

The Federal Highway Administration has released a resource document regarding the transportation performance management program. The document addresses in a question-and-answer format key dates of the performance periods, elements of the bridge condition performance measures, and how to calculate good and poor bridge conditions. The document also addresses when transportation agencies should start collecting pavement data to meet new requirements, and travel time reliability and freight movement measures. In addition, the document discusses elements of the onroad mobile source emissions and traffic congestion measures under the Congestion Mitigation and Air Quality Improvement Program. For more information, link to the document. (10-5-17)

[back to top]

Recent Developments: FTA Guidebooks Address Transportation Asset Management Final Rule

The Federal Transit Administration has posted two final reporting guidebooks to assist grantees in fulfilling new performance measure data and reporting requirements under the transportation asset management final rule. The Performance Restriction (Slow Zone) Calculation guidebook specifies the data needed to report the length of rail fixed guideway under performance restrictions when the maximum speed of transit vehicles is below the guideway’s full service speed. Procedures for calculating restrictions such as listing segments and calculating the restriction length by month is also provided. The Condition Assessment Calculation guidebook addresses the steps to reporting the condition of all facilities that agencies have a direct or share capital responsibility using a single numeric value. The guide highlights condition assessment procedures and aggregate approaches to condition rating. For more information, link to the announcement. (4-24-17)

[back to top]

Recent Developments: FHWA Report Examines Use of GIS in Performance Management

The Federal Highway Administration has released a report that includes four case studies regarding transportation agencies’ use of geographic information systems in transportation performance management (TPM). The report discusses how departments of transportation in Maryland, Ohio, South Carolina and Vermont approach TPM programs and determine how best to use GIS to visualize the effects of performance-based operations and planning. The report found that most states remain in the developmental stage of implementing a TPM program, which is required under MAP-21 and the FAST Act. The report also found that states are investing in the use of GIS tools to better integrate data and to centralize data storage. For more information, link to the report. (2-17-17)

[back to top]

Recent Developments: AASHTO Updates FAST Act/MAP-21 Implementation Plan, Rule Tracker

The American Association of State Highway and Transportation Officials has updated its implementation plan for the FAST Act and MAP-21 and its surface transportation rulemaking tracker. The plan updates the status of provisions regarding revenue and planning, freight, program and project delivery, planning, performance management and asset management. The tracker keeps tabs on rules related to surface transportation as they work their way through the regulatory process. The updated tracker adds a request for comments concerning commercial activities in rest areas. For more information, link here. (12-1-16)

[back to top]

Waste Management/Recycling/Brownfields

Recent Developments: AASHTO Releases Earth Day Video on Recycling and Transportation

In recognition of Earth Day’s 50th anniversary, the American Association of State Highway and Transportation Officials is releasing a two-part series entitled Recycling, Transportation and You. Produced by Transportation TV, this series highlights how state departments of transportation play a major role in recycling asphalt pavement – long considered to be the most recycled product in America – as well as how old tires are broken down into small chunks and reused to make new asphalt pavement. To access the video, link here. (4-22-20)

[back to top]

Recent Developments: Benefits, Costs of TAM Systems Reviewed in NCHRP Report

An evaluation of systems to track transportation asset management (TAM) in terms of return on investment has been issued in a report under the National Cooperative Highway Research Program (NCHRP Research Report 866). The report, issued under NCHRP Project 20-100, provides objective approaches that can be used by transportation agencies to estimate the return on investment in TAM systems such as pavement management systems, bridge management systems, and maintenance management systems. Benefits of TAM systems, such as AASHTOWare Bridge Management software, include more proactive agency approaches to asset management, better prioritization, more robust analytical tools, and better data quality. The report includes an associated spreadsheet tool, the NCHRP Project 20-100 ROI Calculator. The calculator includes factors and procedures from the Highway Economic Requirements System State Version (HERS-ST), which can be used to perform life cycle analysis to reduce waste, prevent pollution, and encourage recycling. For more information, link to the report.

[back to top]

Water Quality/Wetlands

Recent Developments: Newsletter Highlights Integration of Stormwater Infrastructure in State DOT Processes

Integration of stormwater infrastructure into state transportation agency processes is highlighted in the July-August issue of the Transportation Research Board's Transportation Research News. Highlights include incorporation of post-construction stormwater management design into the overall roadway design process, by Alabama DOT; development of an approval process for products used in the construction of a roadway to promote vegetation, by Texas DOT; and management of data associated with stormwater infrastructure best management practices to effectively focus maintenance efforts, by Virginia DOT. For more information, link to the TR News. (9-24-20)

[back to top]

Recent Developments: Study Details How DOTs Can Use Stormwater BMP Database

An analysis of how to access and use the state DOT portal to the International Stormwater Best Management Practices Database, along with an analysis of data of interest to state DOTs, is now available under the National Cooperative Highway Research Program (NCHRP 25-25/Task 120). For access to the final report and presentation slides summarizing the project link here. (March 2020)

[back to top]

Recent Developments: EPA, Corps of Engineers Issue New Federal Water Protection Rule

The Environmental Protection Agency and the Army Corps of Engineers have issued a joint final rule redefining the scope of federal jurisdiction over rivers and wetlands. The final rule, called the “Navigable Waters Protection Rule,” amends the definitions of what are considered and what are not considered waters under federal jurisdiction, for the purposes of discharge and wetlands permitting. The final rule includes, among other things, the new concept of a “typical year” to be used when determining whether a stream is intermittent and protected, or ephemeral and unprotected. The water levels of an aquatic body during a “typical year” are based on a rolling 30-year average of precipitation. For more information, see the EPA Navigable Waters Protection Rule website. (1-23-20)

[back to top]

Recent Developments: State DOT Portal for Stormwater BMP Database Developed

State DOTs now have streamlined access to a comprehensive database of best management practices (BMPs) for stormwater management. The International Stormwater Best Management Practices Database is a repository of BMP field studies, performance summaries, and monitoring guidance. The State DOT Portal is a web tool that provides streamlined access to study data and performance statistics that are relevant to state DOTs and other transportation agencies. The portal was developed under NCHRP 25-25, Task 119. For more information, link to the portal. (1-8-20)

[back to top]

Recent Developments: NCHRP Study Offers Compliance Approaches for Total Maximum Daily Load Requirements

Advice for determining and complying with total maximum daily load requirements related to roadway stormwater runoff is provided in a report from the National Cooperative Highway Research Program (NCHRP 918). The study discusses how state DOTs are involved in the TMDL process, pollutants of concern for roadways, and traditional as well as innovative treatment options. It also outlines a methodology to evaluate performance and cost effectiveness of best management practices and feasibility of innovative solutions such as pollutant trading and stormwater banking. It includes a watershed-based stormwater mitigation toolbox, which allows users to compare compliance strategies for a given project, as well as for broader application to multiple projects and the highway network. For more information, link to the report. (10-21-19)

[back to top]

Recent Developments: EPA, Corps Issue Repeal of 'Waters of the United States' Rule

The Environmental Protection Agency and Army Corps of Engineers finalized their decision Oct. 22 to repeal the Waters of the United States, or WOTUS, rule that spells out which wetlands and waterways are subject to federal jurisdiction under the Clean Water Act. The agencies will instead implement the regulations as they existed prior to 2015, informed by applicable agency guidance documents and consistent with Supreme Court decisions and agency practice. The final rule will take effect Dec. 23, 2019. For more information, link to the rule in the Federal Register. (10-22-19)

[back to top]

Recent Developments: EPA Proposes National Water Quality Trading Market

The Environmental Protection Agency has announced a proposed policy to allow facilities to purchase water quality credits in an environmental trading market that the agency says will provide more flexibility in meeting water pollution goals. The proposal would create a federal version of the types of water trading markets that many states have already established. It would build off a policy memo issued earlier this year that outlined six market-based principles addressing how this type of water pollution market could work. Under the Clean Water Act, water quality trading is an option for those seeking compliance with a discharge permit. For more information, link to the announcement. (9-5-19)

[back to top]

Recent Developments: Recording Available: Stormwater Webinar - Strategies for Addressing Impaired Waters

AASHTO has posted a recording and related materials from its May 10 webinar, Strategies for Addressing Impaired Waters and Achieving Project Delivery, Regulatory Compliance, and Watershed Management Goals. The webinar presented several innovative programs and solutions for addressing challenges associated with impaired waters, including presentations from transportation agencies in Massachusetts, California, and Virginia. For more information, link to the Center for Environmental Excellence Stormwater Community of Practice webinar page. (6-21-19)

[back to top]

Recent Developments: Study Offers Compliance Approaches for TMDL Requirements Related to Stormwater

Approaches to comply with total maximum daily load requirements related to stormwater runoff from roadways are provided in a study issued under the National Cooperative Highway Research Program (NCHRP Report 918). The study includes guidance to help state DOTs engage in the TMDL development process; assess their impacts to receiving waters; and evaluate compliance strategies given estimated DOT contributions to pollutant loadings. It also provides references and case studies of innovative compliance approaches. The study findings also were the subject of a May 10 AASHTO Stormwater Management Community of Practice webinar. For more information, link to the report. (5-28-19)

[back to top]

Recent Developments: EPA Issues Interpretation of Groundwater Permitting Authority

The Environmental Protection Agency is proposing to change its interpretation of federal water pollution law to specify that the law doesn’t allow it to regulate most sources of groundwater. The agency issued an interpretive statement of the Clean Water Act saying that the CWA only applies to lakes, rivers, and other bodies of water on the surface, not groundwater, even if pollution is discharged into groundwater and then migrates into a surface water. The reinterpretation of its permitting authority regarding groundwater was signed April 12 and will be subject to public comment. For more information, link to the announcement. (4-15-19)

[back to top]

Recent Developments: Webinar Recording: Stormwater BMP Maintenance and Operations

A webinar on operations and maintenance of stormwater best management practices was held on Oct. 18, sponsored by the Center for Environmental Excellence by AASHTO and the Federal Highway Administration. The webinar provided an overview of a recent state-of-the-practice report on stormwater BMP operations and maintenance. It covered stormwater asset management programs; inventory and monitoring systems; inspection, rating and priorities; and remediation, challenges, and lessons learned. The web forum, sponsored by the AASHTO Stormwater Community of Practice, included speakers from transportation agencies in Maryland, North Carolina, Oregon, and Pennsylvania. For more information and to view the webinar, link here. (2-1-19)

[back to top]

Case Studies: FHWA Compilations

Case Studies: Florida - Removal of Causeway Segment Helps Florida DOT Restore Tampa Bay

The Florida Department of Transportation has come up with a unique solution to help restore water quality and habitat in Tampa Bay: removing over 200 feet of a land bridge known as the Courtney Campbell Causeway.

The Old Tampa Bay Water Quality Improvement Project – which involved cutting out a portion of the 86-year-old causeway and replacing it with a new water channel and bridge – is already showing beneficial results, according to Daniel Lauricello, District Roadway Engineer, and Virginia Creighton, Environmental Permits Coordinator with the Florida Department of Transportation, District 7.

Completed in November 2018, the project used a whole-system approach. By focusing on the whole watershed rather than project-by-project solutions, FDOT was able to leverage the benefits of the causeway project to address requirements for stormwater management and sea grass mitigation from a related project. This provided the opportunity to accomplish more while also saving money in the long run, according to Lauricello.

Urban Runoff

The Courtney Campbell Causeway has been in place across Tampa Bay since 1934. Over the decades, Tampa’s population has continued to grow, resulting in an increase in pollutants such as nitrogen being discharged into the bay. Florida has designated Tampa Bay as an impaired water body.

Growth also requires that FDOT maintain and improve the transportation system. The Howard Frankland Bridge, which traverses Tampa Bay just south of the Courtney Campbell Causeway, is part of that system and is scheduled for reconstruction. FDOT estimated that it would need to spend about $60 million to purchase additional right-of-way for stormwater management, plus another $3.4 million for sea grass mitigation, as compensation for the bridge project.

Stormwater retention and detention ponds are commonly used for containing runoff before it can reach the bay. In highly urbanized areas such as Tampa, however, there are very few undeveloped parcels on which large stormwater management facilities can be built, and FDOT would pay a premium to purchase the right-of-way.

The solution developed by FDOT and its partners was to strategically excavate 229 feet of the causeway and replace it with a bridge. Opening the causeway has reestablished tidal circulation around the eastern end of the causeway, improved water quality, and is anticipated to support sea grass growth while helping FDOT meet its stormwater management commitments.

The Old Tampa Bay Water Quality Improvement Project cost approximately $12 million but has provided a $50 million net benefit due to the significant reduction of stormwater management for the Howard Frankland Bridge project. “The project is expected to ultimately save as much as $100 million in stormwater right-of-way costs for future projects in the Tampa Bay Area, while accelerating delivery of future projects with available water quality compensatory treatment and sea grass mitigation credits. The project does not eliminate stormwater retention and detention ponds, but significantly reduces their size,” Lauricello said.

Circulation Impaired

The impairment classification of Tampa Bay means that transportation projects in the area also must find ways to improve water quality.

The bay overall has improved over the last 20 years, thanks to the work of the Tampa Bay National Estuary Program and a consortium in the municipalities surrounding the bay. The consortium, known as the Tampa Bay Nitrogen Consortium, has developed a number of programs to reduce polluted runoff, such as constructing stormwater treatment facilities and restoring natural wetlands. However, the Old Tampa Bay segment, where the Courtney Campbell Causeway is located, continued to have poor water quality due to decreased tidal circulation.

“Causeways sever the natural circulation of the water bodies that they pass through,” Lauricello said. This one created areas of poor sea grass growth, elevated nitrogen concentrations, and high salinity. Opening the causeway appeared to be an optimal solution.

Sea Grasses and Marine Life

To plan for the project, a team lead by Virginia Creighton studied water quality and hydrodynamics of the bay waters surrounding the causeway. “That provided us with the best location to truly restore the historical flushing of the area,” Lauricello said.

The studies were an investment in up-front research and proof of concept. For example, they predicted that sea grass populations would recover with improved water circulation. Sea grasses are important to the overall health of the bay. They stabilize the bay bottom, trap fine sediments, shelter small sea life, and provide food for larger animals such as manatees.

When the causeway removal was completed, water quality improved almost immediately. Studies about a month after it was finished showed that tidal flows were restored, and ongoing water quality monitoring has shown very positive results. The benefits were sufficient to allow FDOT to receive the stormwater treatment credits for the Howard Frankland Bridge project, which is set to begin construction in 2020.

“The project was broadly embraced by the Tampa Bay environmental community,” Lauricello said. Fishing has improved and marine life has been observed passing through the new channel. FDOT will monitor the recovery of sea grass in the area for the next few years.

Causeway removal projects have been implemented elsewhere in Florida—in Pinellas and Volusia counties and on Key Largo—with positive results.

Lessons Learned

The project demonstrated the importance of having an atmosphere of innovation, prudent risk taking, and systems thinking, according to Lauricello. It is an outcome of a departmental initiative known as “Environmental Look Arounds,” an initiative to get the right people together to find creative solutions.

Also, FDOT developed a new statewide stormwater management process that encourages collaboration, breaks through regulatory constraints, and motivates FDOT staff to pursue stormwater joint ventures with others while balancing social, environmental, and economic objectives.

“The project shows that systems thinking really does work,” Lauricello said.

Additionally, support from leadership is critical to these kinds of successful projects. FDOT approved the spending on the proof-of-concept studies and supported the necessary investments of time and funds to develop new solutions that ultimately are saving money and providing results.

Lauricello recommends that other DOTs consider causeway removal as a viable water quality tool. “In the right conditions, with the right study and proof of concept, this is a definite benefit to the environment,” Lauricello said.

FDOT has issued a state-wide guidance for developing stormwater management practices that features the Old Tampa Bay Water Quality Improvement Project and other similar innovative approaches as best management practices and viable options over more traditional stormwater management approaches.

The project received a 2019 Environmental Excellence Award from the Federal Highway Administration, along with the 2017 Florida Institute of Consulting Engineers/FDOT Outstanding Environmental Project, the 2019 American Society of Civil Engineers Florida Project of the Year Award, and the Tampa Bay Regional Planning Council Natural Environment Award (2019).

For more information, see the FDOT project summary or contact Daniel Lauricello, District Roadway Engineer, FDOT District 7, at

[back to top]

Case Studies: New Hampshire - New Hampshire DOT Pioneers New Approach to Construction Stormwater Management

The New Hampshire Department of Transportation’s award-winning work managing construction stormwater to protect two water bodies adjacent to Interstate 93 has been a successful demonstration of innovative techniques under real-world conditions.

NHDOT took a completely new approach, especially for the temporary stormwater controls, when widening and reconstructing I-93 south of Manchester where it passes between Canobie Lake and Cobbett's Pond, according to NHDOT’s Director of Project Development Peter Stamnas.

The proposed work on the segment, a nearly three-mile stretch at Exit 3, prompted significant public concern over the potential for turbidity and sediment affecting the nearby water bodies, especially Canobie Lake which provides local drinking water.

I-93 between Manchester and the Massachusetts border had not been significantly upgraded since it was built in the early 1960s, according to project documentation. NHDOT was faced with performing major construction while still meeting the New Hampshire Department of Environmental Services’ stringent water quality standards and the public’s demand for the cleaner construction.

Comprehensive Plan

Knowing that the entire 20-mile project, and the Exit 3 construction in particular, was constrained by the natural geography, NHDOT “really had to start from scratch from a design standpoint” to create a solution for the construction stormwater that would meet NHDES standards and receive public support, according to Stamnas, who joined the project in 2006.

NHDOT used a “new design approach that would be similar to a traffic control plan” but applied to construction stormwater, Stamnas said. The agency reviewed the entire length of the project, analyzing the runoff risk and calculating runoff volumes. Prior to the construction phase, staff identified the areas that would require stormwater controls, resulting in a comprehensive stormwater management plan.

The agency faced constraints within the right of way regarding the surface area for stormwater storage, the hilly terrain, and the nearby water bodies, and had to devise innovative solutions. “There was just too much water and not enough real estate,” Stamnas said.

NHDOT maximized the limited land available within the right of way by collecting water wherever possible and using a system of pumps and pipes to get the water “where it needed to go” for storage and treatment, Stamnas said. This had the added benefit of reducing the number of treatment cells that needed to be constructed.

New Hampshire DOT uses innovative methods to pump and divert construction stormwater for treatment on I-93 project. (Photo: NHDOT)

Treatment with Polyacrylamides

Canobie Lake and Cobbett's Pond created significant challenges since they are the low geographic points along Exit 3 and “everything went there,” Stamnas said. NHDES standards for class B waterbodies (Cobbett’s Pond) require down stream flows not be increased by more than 10 nephelometric turbidity units (NTUs) after the introduction of the stormwater flows. For Class A waterbodies (Canobie Lake) the standard is further reduced to a 0 NTU increase above background levels.

To address this, the agency pioneered a program for linear highway projects which included flocculent system designs, contract bid items, and procedures for the construction use of anionic polyacrylamides (PAMs) as a flocculant to induce the suspended solids in the runoff to form larger flakes. These particles then could be filtered out or allowed to settle, turning sediment-clouded runoff into clear water that would not disrupt local water quality.

NHDOT started out using self-dosing blocks that control the release of PAM into the runoff water. The flocculant was added to a flocculant dosing tank system. The water was then run through in-ground settling basins and clarifying structures that used filtration baffles.

In 2008 and 2009, “we were on the cutting edge” of PAM use from a linear construction standpoint, Stamnas said, and the dosing and filtration methods evolved over time during the project. At the beginning, NHDOT had “difficulties” receiving regulatory approval to use PAMs but “we finally worked through it,” Stamnas said.

The regulators’ concern was that NHDOT would use too much PAM, causing it to be a pollutant itself. Stamnas said eventually they were able to prove that they could make effective use of the flocculants without creating a hazard to water quality. The agency found that by switching from self-dosing blocks to PAM powders, the dosage could be controlled more accurately.

Techniques also were used to divert water that was coming into the site, directing it through bypass pipes so that it did not pick up sediment. This lowered the amount of water that required treatment, Stamnas said.

In addition to treatment, PAMs were used as a soil stabilizer for disturbed slopes.

Contracting and Costs

The significant permanent stormwater retention structures and the locations for construction stormwater controls were included up front in the original contract documents, Stamnas said.

NHDOT provided base plans, required contractors to provide more detailed stormwater control plans, and set up regular meetings to review progress. This allowed the contractors and the field staff to be a lot more prepared, Stamnas said. Conventional erosion and sediment control best management practices (BMPs) and typical management approaches to construction were determined to be inadequate and unnecessarily expensive, Stamnas said.

Also, agency planners and designers created strategies and tools they knew would work in various situations and that could be applied to address field conditions. It provided the contractors and the field staff with options from which they could make decisions based on the situations they were presented with, Stamnas said. Examples of these tools included hydraulically applied mulch systems, unit water diversion items, standard pump and pipe systems, and a packaged flocculent treatment system. NHDOT provided the proposed collection of tools early on so that contractors could bid on them up front rather than including them later through change orders or creating a situation where there was a sole-source supplier.

The construction work at Exit 3 cost approximately $150 million. The agency wanted to place the stormwater controls into the bidding environment to achieve some level of economy. NHDOT was looking for ways to reduce costs, Stamnas said, “and I think we did that.”

Lessons Learned

According to NHDOT, completing a construction stormwater assessment during the design phase of large projects pays dividends. It identifies potential risks early and allows items to be included in the contract to minimize costs and mitigate risk potential. Also, contractors are more prepared, and it reduces their time to prepare stormwater protection plans, so work can start sooner.

Diverting water around the active construction zone is critical and constructing temporary sedimentation basins as early as possible reduces treatment efforts.

Also, the construction site is constantly changing, and strategies that work one month may not work as well the following month. The matrix of tools allows for solutions to be implemented quickly and cost-effectively.

Additionally, PAMs are very effective in reducing turbidity in construction runoff and are safe for the environment when used properly. They reduce soil loss, reduce phosphorous levels in treated stormwater, have negligible effect on water pH, and lower biochemical oxygen demand in runoff.

Traffic was placed in the final lane configurations through the Exit 3 area over the summer and this segment of the corridor project was declared substantially complete in November of 2016. Four more years of construction lie ahead along the remaining segments of the 20-mile corridor project.

The Exit 3 stormwater control project earned NHDOT the “Best Use of Innovation” award in the medium-sized project category from the Northeast Association of State Transportation Officials (NASTO) for its efforts to protect the natural resources.

“It’s a new way of looking at linear construction and it’s working really well,” Stamnas said. Based on the size and complexity of future projects NHDOT now has a comprehensive list of strategies to draw from for use around the state.

For more information on the Rebuilding I-93 project, visit the project website at or contact Wendy Johnson, Project Manager with NHDOT, at

[back to top]

Case Studies: Oregon

Case Studies: Oregon - Oregon DOT Develops Center to Test Stormwater Treatment Technologies

A facility to help practitioners test the effectiveness of stormwater treatment technologies is being developed by the Oregon Department of Transportation.

The Stormwater Technology Testing Center (STTC), under construction at the Northeast Portland Maintenance Yard, is intended to provide designers and users of stormwater treatment technologies a tool to provide non-biased assessments of the effectiveness and maintainability of technologies being considered for installation at their facilities, according to Paul Wirfs, P.E., Deputy Geo-Environmental Manager.

Officials hope the new center – which is expected to open in 2017 – will help develop information on the maintainability and life cycle cost for stormwater treatment technologies that will help to protect the environment and transportation investments.

Background on Testing Center Development

State and federal agencies, together with environmental organizations, have expressed increasing concern regarding the effectiveness of stormwater treatment devices and facilities in achieving water quality standards required by permits. Transportation agencies also face ongoing concerns over maintenance costs related to stormwater treatment.

The concept for the STTC was developed by a group of stormwater professionals that ODOT convened in 2011 to discuss the challenges and ways to improve the management of large stormwater programs. The group included representatives from ODOT, other state and local agencies, and the Washington Department of Ecology (WDOE). A board has been established to provide direction on the operation of the STTC including local, state, and federal agency representatives from Oregon, Washington, and California.

Although WDOE and several other agencies had facilities or protocols established to evaluate pollution removal effectiveness of stormwater treatment devices, they could not demonstrate the capability of a long-term stormwater treatment device, the maintenance required for the technology, the costs of maintenance, and at what point the technology would fail and require replacement.

Over a two-year period between 2009 and 2011, the STTC concept was developed, including a business plan, maintainability evaluation protocols and a quality assurance project plan.

The STTC Board identified several potential sites for the center, ultimately choosing the Northeast Portland Maintenance Yard site. The site provided adequate stormwater supply and representative stormwater, an adequate facility site area with the possibility of expansion, an appropriate discharge point, and gravity flow stormwater conveyance to the testing facility. In addition, the site offered safe access and was already owned by ODOT.

Officials also noted that the STTC was one of several projects that ODOT funded to meet the commitments of a settlement agreement in response to a notice of intent to sue over alleged permit violations.

The Northwest Environmental Defense Center alleged that ODOT was not in compliance with its National Pollutant Discharge Elimination System Municipal Separate Storm Sewer Systems (MS4) permit. While that allegation was never proven, ODOT officials said the agency “chose to invest in stormwater improvement rather than on litigation.” The STTC qualified as part of that investment along with multiple other stormwater retrofit projects within the Willamette River Watershed.

The Art and Science of Stormwater Testing.

The testing center consists of a combination of pumps, pipes, an air compressor, sensors and computers that work together to gather representative stormwater samples for laboratory analysis.

The STTC includes 3 “pads” or “test bays” where each technology is connected to the testing center control and piping systems. The technologies can be installed at the appropriate elevation and configuration as defined by the specifications provided by the owner of the technology. This is all located within the footprint of the STTC.

Stormwater is diverted from a 7-foot diameter drainage pipe along I‐ 205 at Columbia Slough to a large manhole called the feed wet well. A pump recirculates the stormwater and the debris in the feed wet well, allowing suction pipes to pull in a representative sample of the pollutants in the stormwater.

High-velocity vacuum samplers pull samples of the raw stormwater into jars to be sent to a laboratory for analysis. The diameter of the suction pipes, which varies from 2 inches to 4 inches depending on the pumping flow rate, ensures that flow velocity is fast enough to move sand and other debris along and carry it to the test bays. Clear PVC pipe and clear hose allow pipe-flow to be monitored, especially when leaves and sand are entering storm drains.

The process also uses a “programmable logic controller” that controls pneumatic valves in order to match the suction pipe diameter to the required pump speed. It monitors the water surface in the feed wet well and test bays with sensors to determine if too much water is being sent to the technology being tested. If the water level is rising and is about to bypass some of the raw stormwater, the programmable controller slows the dosing flow rate. All of the data regarding the water surface and flow rate are sent to a remotely operated computer program for archiving and analysis.

Ultimately, samples are sent to the laboratory, where the influent and effluent are analyzed for pollutant levels, providing data on the removal efficiency of the technology being tested.

The site is currently configured to test any type of vault, filter, or manhole shaped devices, and it can test up to three technologies simultaneously. The site also can be expanded in the future to test swales, slopes and small ponds.

“Currently, we can run the system and have made a few test runs,” according to Dan Gunther, a hydraulics engineer at ODOT. “We are still working on the software and controlling the site remotely,” he said. Testing of technologies will begin in earnest once all the software and remote controls are installed.

Quantifying Technology Costs, Maintainability.

ODOT officials said the STTC will help to quantify the maintainability performance characteristics and costs of commercially ready stormwater treatment technologies. It is available to serve as a national laboratory for the professional stormwater community and will provide an unbiased and credible assessment of stormwater treatment technologies.

ODOT intends for the STTC to become a self-sufficient facility, supported by testing fees; however, financial support by owners and operators of stormwater technologies will ensure continued operation of the facility. In the future, the facility may be expanded to include additional testing bays and testing parameters such as dosing, bacteria, nitrates and more.

In terms of challenges, officials said it has taken longer than planned to obtain start-up funding and to get the facility up and running.

In that regard, states can help support the center by contributing to an ongoing Federal Highway Administration pooled fund program. A total of $300,000 is being requested to go toward business management services, calibration and testing, and data protocols. So far, a total of $125,000 has been committed, including $100,000 from Pennsylvania DOT, $15,000 from Washington State DOT, and $10,000 from the Port of Portland.

Other elements of the STTC calibration and start-up have been funded by a State Transportation Innovation Council grant from the Federal Highway Administration.

To date, ODOT has invested approximately $950,000 on the concept development and construction of the center. One more push of funding will move the project forward to full operation when testing can begin.

In addition, ODOT officials said they would like to hear from other DOTs that are interested in joining the Board or participating as a stakeholder.

For more information on the STTC, contact Paul Wirfs at or link to the pooled fund program solicitation.

[back to top]

Wildlife & Ecosystems

Recent Developments: Agencies, Businesses Apply to Participate in Monarch Conservation Agreement

Eight transportation agencies and eight energy companies have applied to participate in the nationwide conservation agreement for the monarch butterfly, the U.S. Fish and Wildlife Service has announced. The Nationwide Candidate Conservation Agreement with Assurances for Monarch Butterfly on Energy and Transportation Lands, launched in April, encourages transportation and energy partners to provide and maintain monarch habitat on potentially millions of acres of rights-of-way and associated lands. FWS said these applicants, alone, “have the potential to conserve and restore more than 600,000 acres of monarch habitat on 2.3 million acres of rights-of-way in 22 states.” The agency also expects more participants to join. In order to enroll in the agreement, participants must commit to measures including monitoring and adaptive management practices. (see related case study) For more information, link to the announcement. (8-26-20)

[back to top]

Recent Developments: Endangered Species, Pesticides Revised Evaluation Method Released

The Environmental Protection Agency has announced a new method for evaluating the effects of registered pesticides on endangered and threatened species. The Revised Method will streamline pesticide registration review decisions while also ensuring that the impacts to endangered and threatened species are minimized. The final Revised Method incorporates high-quality pesticide usage data into the agency’s biological evaluation (BE) process for the first time and was informed by input from a wide range of stakeholders, including states, tribes, environmental groups, and agricultural groups. For more information, link to the announcement and the Revised Method. (3-12-20)

[back to top]

Recent Developments: Study Analyzes Wildlife Responses to Traffic Noise, Light

A study by the Road Ecology Center at UC Davis analyzes the distribution of wildlife relative to highways and wildlife behavior in response to instantaneous traffic disturbance. Researchers measured traffic noise and light levels and placed motion- and heat-triggered cameras at 26 bridges and culverts along four interstate highways, 11 state highways and one major county road across California. The study found complex and species-specific responses to noise and light from traffic, prompting researchers to begin to design crossing that will meet the behavioral needs of wildlife. To access the report, link here. (6-9-20)

[back to top]

Recent Developments: June 10 Webinar: Wildlife Behavior in Response to Traffic Disturbance

A June 10 webinar hosted by University of California, Davis, will present findings of a study of traffic impacts on wildlife behavior. The study, by the Road Ecology Center at UC Davis, looked at the distribution of wildlife relative to highways and wildlife behavior in response to instantaneous traffic disturbance. The study found complex and species-specific responses to noise and light from traffic, prompting researchers to begin to design crossing that will meet the behavioral needs of wildlife. For webinar registration, link here. (5-26-20)

[back to top]

Recent Developments: NCHRP Report Profiles Designs for Small Animal Crossings

Transportation agencies can help to reduce reptile, amphibian, and small mammal deaths on roads and highways with the effective design and construction of crossing structures and barriers, according to a study conducted under the National Cooperative Highway Research Program. The project, NCHRP 25-25/Task 113, Road Passages and Barriers for Small Terrestrial Wildlife: Summary and Repository of Design Examples, includes a project summary report, presentation slides, seven case studies, a literature review report, and a report from the survey. In addition, the project developed design considerations for six categories of crossings and barriers that includes technical drawings, images, and other guidelines. The project report says that more research is needed to further determine effective crossing and barrier designs, especially for reptiles. For more information, link to the NCHRP project page. (9-23-19)

[back to top]

Recent Developments: Study Shows Animal Detection System Can Deter Collisions

The Virginia Department of Transportation has issued a new study on the use of buried cable animal detection systems as a way to mitigate collisions between wildlife and vehicles. The system would provide warnings to drivers when triggered by the active presence of an animal on or near the roadway. During an 11-month study period, VDOT found the system capable of detecting deer and sometimes smaller animals such as coyotes with 99% reliability. The system also performed well when covered by snow. VDOT also found that by using the buried cable connected to a flashing warning sign, approximately 80% of drivers either braked or slowed in response. For more information, link to the study. (6-20-19)

[back to top]

Recent Developments: DOTs to Partner in Conservation Effort for Monarch Butterflies

State transportation agencies would play a key role in an unprecedented conservation effort for the monarch butterfly announced by the U.S. Fish and Wildlife Service. Under the agreement, voluntary conservation efforts will be undertaken by a coalition of transportation agencies and energy companies on highway and energy rights of way in the hopes of precluding the need to list the monarch as an endangered species. In return, the agreement would provide regulatory assurances to participants that additional conservation measures would not be required if the butterfly were to be listed in the future under the Endangered Species Act. For more information, link to the FWS’ Nationwide Candidate Conservation Agreement on Energy and Transportation Lands., (4-12-19)

[back to top]

Recent Developments: FHWA Updates List of State DOT Pollinator-Friendly Practices

The Federal Highway Administration has updated its list of pollinator-friendly practices in roadside vegetation management by state DOTs. There are now programs featured from 33 state DOTs, including pollinator habitat programs, guidelines, project enhancements, and vegetation management efforts. For more information, link to the State DOT Pollinator-Friendly Practices section on the FHWA Pollinators website. (2-19-19)

[back to top]

Recent Developments: Report Highlights Wildlife Crossing Workshop and Peer Exchange

The Federal Highway Administration has issued a summary report on an October 2018 Eco-Logical workshop held in Maggie Valley, N.C., focused on wildlife crossings. Workshop attendees shared information on wildlife data collection, data collection techniques, wildlife crossing options, and wildlife-vehicle collisions in the North Carolina/Tennessee I-40 corridor. For more information, link to the summary report. (2-5-19)

[back to top]

Case Studies: Minnesota - DOTs Partner to Conserve Monarch Butterfly Habitat in Rights-of-Way

Transportation agencies across the nation are working to create and maintain more habitat for the monarch butterfly, as part of a pioneering nationwide effort by rights-of-way owners to help save the species from extinction.

The effort comes amid growing concern about the rapid decline of the monarch butterfly. The U.S. Fish and Wildlife Service is considering listing the species under the Endangered Species Act and is expected to make a formal decision by the end of 2020. A decision to list the species as endangered or threatened would have a sweeping effect on how land is managed in almost every part of the country. Monarch breeding and feeding habitat is located across most of the eastern United States, with additional habitat in western states.

The Minnesota Department of Transportation (MnDOT) is one of a coalition of state DOTs that have been working together over the past few years on an agreement to protect the butterfly and its habitat. The agencies hope the effort will potentially forestall the need to list the monarch butterfly as threatened or endangered, according to Christopher Smith, the Protected Species Program Coordinator at MnDOT and co-chair of the DOT Sector team along with Kris Gade, Roadside Resources Specialist at Arizona DOT. At the same time, the agreement would offer more regulatory certainty to participating agencies if listing occurs.

Once put into effect, the Nationwide Candidate Conservation Agreement with Assurances (CCAA) for Monarch Butterfly on Energy and Transportation Lands will be available to the entire contiguous 48 states. It is the first such nationwide agreement for any species.

“This certainly is in the DOTs’ best interests,” Smith said, adding that “everybody wants to do the right thing” for the monarch. DOTs that participated in developing the monarch agreement include Arizona, California, Colorado, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Maine, Minnesota, Nebraska, Nevada, North Carolina, Ohio, Oklahoma, Texas, Virginia, and Wisconsin.

Rights-of-Way as Habitat

The loss of suitable habitat is the primary reason monarchs have declined in recent years. According to the Rights-of-Way as Habitat Working Group, a project of the University of Illinois at Chicago, transportation and energy rights-of-way present a major opportunity to create or enhance breeding and foraging habitat for monarchs.

Rights-of-way have the potential to add approximately 2.3 million acres of high-quality habitat, including native milkweed plants that the monarchs rely on as host plants for laying their eggs and raising their caterpillars, as well as flowering plants that provide nectar for food.

Once fully implemented, designated acres of roadsides will be managed and maintained to support such habitat. This may mean more restrictions and requirements concerning vegetation management, but the additional work will be offset by regulatory certainty provided by the agreement, Smith said.

Conservation and Predictability

The CCAA agreement, negotiated with the U.S. Fish and Wildlife Service, was created through a coalition of 20 state DOTs, numerous energy companies, federal partners including the Federal Highway Administration, and technical consultants. The CCAA includes “assurances,” allowing participants to voluntarily contribute to species survival by preserving and enhancing habitat. In return, should an Endangered Species Act listing occur, participants will not be required to implement additional conservation measures beyond those in the agreement.

“Transportation projects are planned years ahead of time, and DOTs wanted that predictability and a clear process,” Smith said.

To participate in the agreement, a DOT or energy company would first enroll their rights-of-way under the agreement. Of those enrolled lands, a specified minimum percentage—8% for U.S. and state highways and Interstates; 5% for local roads—will become “adopted acres” that will require active monarch conservation efforts.

Should the butterfly be listed, activities such as construction or maintenance in the right-of-way will be allowed to continue despite the occasional unintentional loss of monarch adults or caterpillars. Also, the DOT or energy company would be required to conduct periodic monitoring to verify that the conservation measures are working.

The agreement encourages the use of integrated vegetation management and diverse groundcover that is both consistent with operations in the right-of-way and supportive of habitat requirements.

Challenges and Lessons Learned

The agreement was developed unusually quickly, especially considering that there were more than 45 parties to the agreement plus the federal partners. “It’s been very successful. We’re all more or less interested in the same thing, so it’s been a relatively smooth process,” Smith said.

Smith said that MnDOT is already considering the challenges to implementing the conservation measures that come with being a large agency. MnDOT’s district office roadside management staffs will need to be trained on the mowing and herbicide procedures to protect monarch habitat. Additionally, with the harsh winters that are common in Minnesota, the accumulation of road salt in the right-of-way would need to be considered to avoid unintentionally harming the butterflies, Smith said.

From the beginning, the effort has received support at various levels of the agency as MnDOT staff recognize the long-term benefits to participation in the agreement.

Next Steps

Smith expects there to be more success stories and challenges as the agreement is put into practice. For instance, not all roadsides are ideal for monarch habitat. While MnDOT intends to enroll most of its highway system—since milkweed grows almost everywhere in Minnesota—the agency will then need to define the conservation acreage, Smith said.

“Everyone has limited resources. We don’t have resources to create habitat everywhere, so we have to decide how to prioritize where it should go,” Smith said.

Help with locating and prioritizing suitable habitat is being provided by the Monarch Joint Venture, a non-governmental organization dedicated to monarch butterfly conservation and research, according to Smith.

Creating the agreement involved cooperation that went beyond state borders and has encouraged discussion of other circumstances that might benefit from a similar effort, according to Smith. “I have no doubt that there will be new and innovative ways to more effectively work across boundaries,” Smith said.

At the same time, state governments all have unique circumstances that influence decision making, Smith said, and as a result, the mix of participants in the agreement may change over time.

MnDOT will face the ongoing need to communicate effectively with the public and within the agency about the benefits and limitations to participation and what, ultimately, is in the best interests of the monarch butterfly, according to Smith.

The U.S. Fish and Wildlife Service has determined that all conservation commitments enrolled under the agreement by May 31, 2020, will help determine whether the monarch will be designated as a listed species.

For more information, including examples of state DOT approaches to enrollment, link to the Rights-of-Way as Habitat Working Group website, to the U.S. Fish and Wildlife Service’s monarch butterfly page, or contact Christopher Smith, Protected Species Program Coordinator, Minnesota DOT, at or Kris Gade, Roadside Resources Specialist, Arizona DOT at

[back to top]

Case Studies: Road Ecology Center, UC Davis

Case Studies: Road Ecology Center, UC Davis - Transportation Agencies Test Advanced Imaging for Wildlife Movement

The use of web-enabled cameras to better understand wildlife movements on and near highway rights of way could provide transportation agencies with more timely data, lower costs, and help prevent animal-vehicle collisions.

The Federal Highway Administration is sponsoring research on the use of wildlife cameras that can feed data directly through the internet to a web-database ( Transportation agencies would use the proposed system in areas with wired, wireless or cellular system connectivity to track animal movements, verify the effectiveness of protective measures for wildlife, and gather data. Eventually, agencies could use the system “in conjunction with existing traffic camera infrastructure and adding wildlife monitoring to the data stream,” according to the agency.

Web-enabled cameras immediately transfer images such as this moose crossing through a culvert on US 91 in Utah. Photo: Fraser Shilling, Road Ecology Center at UC Davis

Working in partnership with the California Department of Transportation and other state departments of transportation, researchers are now further refining commercially-available camera systems to meet the needs of DOTs. The agencies and partners are field testing the camera and database systems to evaluate both their effectiveness in capturing and managing wildlife images and their ease of use.

An integral part of the system is an online database which is set up to receive image files uploaded either by transportation agency staff or directly by the remote, wire­less cameras. The system then automatically creates database records for image files based on information already attached to the file, such as the date and time an image was captured. From there, agency biologists can manage, analyze and share the wildlife images.

Transportation agencies in California, Colorado, South Dakota, Virginia and Utah are field testing the technologies, supported by FHWA’s Exploratory Advanced Research Program (FHWA-PROJ-13-0107).

New Era of Wildlife Monitoring

In an era when most of us have nearly instant information concerning most things in our lives, these types of technologies could “up the game” regarding roadside wildlife monitoring, said Fraser Shilling, the principal investigator on the project,

As compared to cameras and sensors used for monitoring traffic and other environmental conditions, camera methods used by state departments of transportation for wildlife monitoring are quite a bit behind, said Shilling, co-director of the Road Ecology Center located at the University of California, Davis.

That’s why the use of advanced imaging technology such as web-enabled cameras potentially could advance the state of the practice on understanding wildlife movements and roadside ecology, and help improve highway safety. Such technologies are important to transportation agencies and society, with costs of wildlife-vehicle collisions estimated to be in the millions of dollars annually.

A recent report issued by the Road Ecology Center and co-authored by Shilling estimated the cost to society of wildlife-vehicle collisions in California in 2015 was around $225 million. The cost of property damage alone was estimated at more than $88 million annually for the state.

FHWA Supports Research

The FHWA is working with state DOTs to promote their wildlife stewardship and public safety missions. Safer wildlife crossings, for instance, are a key component of the FHWA’s efforts to implement Eco-Logical, the landscape-level approach to integrate infrastructure development and ecosystem conservation.

The EAR project is supporting the field testing of cameras and other low-powered sensor systems or unstaffed sensor technologies that will provide data for project delivery, environmental assessment and decision support.

Currently, state DOT biologists monitor wildlife such as deer, bears, mountain lions, elk, and pronghorn sheep using static camera systems in remote locations, known as camera traps, Shilling said. While static camera traps have been useful for gathering data about what types of animals interact with highways, they have some limitations.

Shilling explained that camera traps require the efforts of staff or contractors in order to retrieve pictures or video. One camera trap can yield around 3,500 pictures per month that must be viewed, sorted and recorded. Spread over several miles, a wildlife monitoring project that includes around 50 cameras could result in tens of thousands of pictures to review. Thus, having cameras that stream data to the headquarters office or a web-connected database such as would allow DOT staff to evaluate pictures within minutes of the animal being sighted.

Colorado DOT SH-9 Project

The Colorado Department of Transportation has used the web-connected cameras as part of its SH-9 Colorado River South Wildlife & Safety Improvement Project. This 10-mile section of highway near Kremmling had more than 500 wildlife-vehicle collisions in the previous 10 years, mostly elk and deer. To monitor the installed mitigation features, CDOT is working on a monitoring study involving more than 60 motion-triggered wildlife cameras, some of which are connected using cellular phone networks, according to Bryan Roeder, CDOT’s Environmental Research Manager.

“The camera data is critical not only for determining the success of the mitigation, but for adaptive management of that mitigation and applying lessons learned to future mitigation,” Roeder said. “This project is expected to produce about one million photos per year, so we are very interested in the future of automated image analysis processes.”

Using the connected cameras, which instantly send photos by e-mail to project researchers, “is a much more convenient method than traditional cameras,” Roeder said. “The ability to view and share photos within minutes of an animal crossing in front of a camera is valuable.”

Jeff Peterson, Manager of CDOT’s Wildlife Program, agrees. “Because SH-9 is the first project in the state to include wildlife overpasses, we are very interested in how effective they are in facilitating connectivity between habitat areas,” and having instant notification from the web-connected cameras is a key component, Peterson said.

Cost Savings

Another issue that such systems would improve upon is the cost—in time and money—for DOTs to maintain camera traps.

Bridget Donaldson, a senior research scientist with the Virginia Department of Transportation, says she is the only one in VDOT that manages the state’s camera traps, relying on university students for help. She hopes to soon install one of the cameras for Shilling’s field test, but for now it takes time to go into the field and visit each camera to gather data and check on battery life.

There would be “huge time savings involved” with the web-enabled cameras, Donaldson said. VDOT currently has a monitoring project along I-64 near Charlottesville, and the time spent visiting each camera to check the number of stored photos would be significantly less since that data would instead be transmitted to her office. Moreover, researchers would know sooner whether cameras are encrusted with winter road salt or knocked out of alignment by snow plows, she said. In cases where cameras are located at some distance from DOT offices, there is simply the travel time to get there.

Also having to pull over on a 70 mile-per-hour interstate to service the cameras presents issues of safety, Donaldson said.

These types of savings can be coupled with savings to society from avoiding animal-vehicle collisions.

In Virginia, Donaldson mentioned that an area VDOT is monitoring outside Charlottesville has deer-vehicle collisions at an average rate of eight per mile per year. Taking into consideration the drain to the economy and the constant potential for loss of human life, this is a rate that justifies VDOT installing fencing along the highway to lead deer and other wildlife to safer underpasses.

Connect With Public, Other Agencies

Shilling sees data being shared with researchers, DOT staff, and the public. For example, in a situation where a DOT has recently installed wildlife crossings to protect mountain lions, if a camera captured a mountain lion using the new structure, the DOT press office could use pictures from the cameras in a news release issued the next day.

Sharing data with other agencies such as fish and game departments could also improve collaboration between departments, Shilling said, and researchers are investigating the use of image analysis software to automate the identification of common wildlife species. The combination of science and public relations becomes increasingly important as public knowledge and awareness can contribute to safer wildlife interactions within rights of way, according to Shilling.

Lessons Learned

The Road Ecology Center tried developing its own web-connected camera but now is mostly testing commercially available systems, Shilling said. With some of the systems that have been tested, the picture resolution is lower than what biologists typically are used to, which manufacturers say permits faster internet transmission.

Camera systems will probably continue to improve as more and more—as many as 100 or 200 at a time, by Shilling’s estimate—are purchased and used by DOTs. The companies that manufacture the systems, which can cost between $100 and $1200 apiece, are beginning to take notice, Shilling said.

Next Steps

The FHWA’s EAR project envisions a system for monitoring wildlife in rights of way that “resembles current traffic flow monitoring systems.” Shilling suggested that creation of wildlife operations centers would “up the game” of wildlife monitoring for transportation agencies.

Using information from the field tests, the researchers will develop short training videos, conduct a webinar, and provide onsite training with DOT staff. The research­ers will then present to the FHWA recommended camera and database systems, along with documentation describing how to acquire, set up, and use them.

Also, the researchers will be writing articles describing both the informatics and camera sampling process for publication in peer-reviewed journals. Additionally, the researchers will improve the data associated with the pictures—called EXIF data—to include such information as location and weather. This more complex information will allow biologists and DOT staff to more easily visualize the ecological context of camera placements and will add value to the information being collected, Shilling said.

Information regarding the Road Ecology Center research is available at

For more information on the web-connected wildlife camera research, contact principal investigator Fraser Shilling, co-director of the Road Ecology Center, University of California, Davis, at or Deirdre M. Remley, Environmental Protection Specialist/Research Coordinator, FHWA at

[back to top]

Case Studies: FHWA Compilations

New - items posted in the last 7 days

AASHTO (American Association of State Highway and Transportation Officials)
skip navigation