Remote Sensing for DOT Stormwater Monitoring
Monitoring of stormwater runoff from highways is a required element of most DOT NPDES permits, and some DOTs are required to monitor receiving waters as well. Monitoring and sampling activities…
Retrofit Needs Assessment and Whole Life Cost Assessment
The US interstate highway system is essentially complete, and was constructed in large part without the benefit of stormwater quality features to improve highway runoff water quality or measures to…
Guide to Low Effect Habitat Conservation Plans for Transportation Agencies
Overview of low effect HCPs, tips for preparation and case studies from transportation agencies that are currently using low effect HCPs to address endangered species affected by non-federal projects and…
Current Practices for Pollinator Conservation on Roadsides
Synthesis, case studies, and summary of approaches to conservation of pollinating insects, including both species listed under the Endangered Species Act and unlisted species. The synthesis would include information from…
Determining the Impact of Evolving Technologies and Programs on Future Fleet Changes and Air Quality
Background: New vehicle technologies, publically sponsored programs, and public-private partnerships designed for various reasons but applicable to reduce vehicle-generated emissions have been emerging for a decade or more. These include…
Identification of the Models, Linkage and Variables Used in Highway Air Quality Analysis
Background: There are several types of models used in analyzing highway emission impacts to air quality for both regional analysis and project or hotspot analysis and for both for NEPA…
Optimizing and Streamlining Data Collection and Analysis for Project Level Air Quality Modeling
State DOTs would benefit from guidance that goes beyond the norm on how to conduct modeling for project-level air quality analyses and addresses which modeling inputs are the most cost-effective…
Reducing GHG Emissions from road freight transport with Electric Road Systems
Problem Freight movement accounts for approximately 20% of greenhouse gas (GHG) emissions from transportation and is expected to increase in its share. International Transport Forum (ITF) estimates that global emissions…
Evaluating the impacts of highway geometric design on public health and vehicle emissions
Recent studies demonstrated that vehicle toxic emissions (e.g. CO, NOx, and HC) are sensitive to geometric road design, which is also associated with driving stress and in-vehicle noise levels. For…
Developing a practical framework to optimize the length of weaving segments by incorporating environmental and public health factors
A weaving segment on freeway is one of vehicle conflict hot spots. Many studies have been focused on the safety and mobility performance of the weaving segment, in terms of…