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Center for Environmental Excellence | AASHTO
Center for Environmental Excellence | AASHTO
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  • Laws & Agreements
    • Programmatic Agreements Library (PAL)
    • Case Law Updates on the Environment (CLUE)
    • National Environmental Policy Act (NEPA)
    • NEPA Assignment
  • State of the Practice
    • Case Studies
    • Communities of Practice
    • Practitioner Interviews
  • Education
    • Environmental Topics
      • Active Transportation
      • Air Quality
      • Climate Change
      • Environmental Justice
      • Invasive Species/Vegetation
      • Stormwater
      • Sustainability
      • Traffic Noise
      • Waste Management/Recycling
      • Water Quality/Wetlands
      • Wildlife and Ecosystems
    • Practical Applications
      • Context Sensitive Solutions
      • Emerging Technologies
      • Environmental Management Systems
      • Geographic Information Systems
      • NEPA Process
      • Planning & Environment Linkages
      • Project Delivery
      • Protecting Cultural Resources
      • Public Involvement
      • Transportation Policy
      • Using the Practitioner’s Handbooks
  • News
  • Meetings & Events
    • Past Events
  • Resources
    • Practitioner’s Handbooks
    • AASHTO Publications
    • AASHTO Standing Committees
    • Federal & State Agencies
    • Trade Associations
    • Research
      • NCHRP 25-25
      • TERI Database
      • TRB Committees

Case Studies

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Example of the installation of silt fencing, drainage channel protection, along with seeding and straw to prevent the erosion of soil during construction of our roadways.

Ohio DOT Environmental Commitments System

By Amber GarnettJuly 5, 2022

Introduction  Ohio Department of Transportation (ODOT) established a detailed process for environmental commitment development and tracking. ODOT’s Environmental Commitment Manual, originally prepared by the Office of Environmental Services in 2017…

Navajo Lake Road

Utah DOT Environmental Commitments System

By Amber GarnettJuly 5, 2022

Introduction  Utah Department of Transportation (UDOT) established an electronic data system (ePM) for tracking environmental documents and commitments. Use of the ePM software is not only an efficient way for…

Figure 3: Simulation of the Canyon Viaduct Above Clear Creek Canyon

Integration of Resilience and Context Sensitivity on a Mountain Corridor: Interstate 70 Floyd Hill to Veterans Memorial Tunnels Project, Colorado

By ahardingMarch 23, 2022

Background The following case study examines a transportation project that uses the Context Sensitive Solutions (CSS) and Design (CSD) processes to integrate resilience to existing hazards through project design. CSS/CSD…

Sidewalk and Wall Improvements

Integration of Resilience and Context Sensitivity in a Coastal Environment: State Road A1A in Fort Lauderdale, Florida

By ahardingMarch 23, 2022

The following case study examines a transportation project that builds resilience to climate hazards into project design, while also demonstrating the Context Sensitive Solutions (CSS) and Design (CSD) processes. Download…

Excavation at Crookston Slope site.

The Minnesota Department of Transportation on Using the Design–Build (DB) Method of Project Delivery

By ahardingMarch 23, 2022

The Minnesota Department of Transportation (MnDOT) has utilized the Design–Build (DB) method of project delivery for two decades and has experienced a variety of benefits. MnDOT has also delivered successful…

Replacement Bridge on Kirks Mill Rd over Reynolds Run, Lancaster County, Pennsylvania.

Design Build and Public–Private Partnerships: Project Delivery Advancements at Pennsylvania Department of Transportation

By ahardingMarch 23, 2022

The Pennsylvania Department of Transportation (PennDOT) has utilized the Design–Build (DB) method of project delivery for several highway projects and has experienced a variety of benefits. PennDOT has also recently…

Highway in Utah

Design–Build, Progressive Design–Build and Construction Manager/General Contractor: Alternative Project Delivery Success in Utah

By ahardingMarch 23, 2022

The Utah Department of Transportation (UDOT) has utilized the Design–Build (DB) method of project delivery since 1997, and has generally found the DB method to benefit complex highway projects through…

Open laptop back to back with open encyclopedia

Context Sensitive Solutions/Design (CSS/CSD) in University Curricula

By ahardingMarch 23, 2022

Introduction Educating the “professionals of tomorrow” is an important strategy to incorporate new concepts into the transportation profession. The AASHTO Center for Environmental Excellence Design Flexibility and Context Sensitive Solutions…

Bridge over river

Vermont Agency of Transportation Expands Emphasis on Managing Roads in Concert with Streams and Rivers

By ahardingApril 29, 2021

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…

Small network of pins pushed into blue board.

Tennessee DOT Conducts Statewide Vulnerability Assessment for Transportation Assets

By ahardingApril 29, 2021

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)…

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The Center for Environmental Excellence by the American Association of State Highway and Transportation Officials (AASHTO) has been developed in cooperation with the Federal Highway Administration to promote environmental stewardship and to encourage innovative ways to streamline the transportation delivery process.

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