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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

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Climate Change, Displacement, and Environmental Justice Populations

By ahardingMay 7, 2021Leave a comment

Brief background of issue and its importance:  Development projects, conflicts, and disasters can cause displacements of persons or communities.  It is anticipated that with global climate change the number of…

Alternative Fuels, Multimodal Freight Transportation Access/Efficiency and Infrastructure Investment Needs

By ahardingMay 7, 2021Leave a comment

Problem: An emerging public policy issue that will likely have significant and potentially far-reaching impacts is the growing interest in and use of renewable and bio-fuels. The goal of reducing U.S.…

Noise Metrics Beyond the 65 DNL/CNEL

By ahardingMay 7, 2021Leave a comment

The size of DNL 65 dB noise contours around the nation’s airports has diminished steadily for the past three decades; and now most noise complaints come from persons residing outside…

Quantifying Emissions of Greenhouse Gases under Real-World Driving Conditions

By ahardingMay 7, 2021Leave a comment

We propose an on-road study of vehicular non-carbon dioxide (CO2) greenhouse gas emissions.

Long Term Construction and Maintenance Cost Comparison for Road Stream Crossings: Hydraulic Design vs. Bankfull Width Design

By ahardingMay 7, 2021Leave a comment

The design and installation of road stream crossings to accommodate fish and aquatic live passage is becoming a priority for state and federal regulatory agencies.  State and municipal project designers…

Managing Private and Public Roles in NEPA Compliance for Projects Utilizing Alternative Funding Strategies

By ahardingMay 7, 2021Leave a comment

States are increasingly facing the spectre of funding transportation projects with little or no federal transportation capital. NEPA compliance is required when federal funds are utilized, or when a permit,…

Investigation into Transportation’s Impact on Visitor Experience

By ahardingMay 7, 2021Leave a comment

Background: Many people have speculated on the impact of transportation on visitor experience on public lands, but rigorous research has not yet addressed the question. Ridership surveys at individual national…

Assessing the Impact of New Transportation Investments and Emerging Transportation Technologies on Traditionally Underserved Groups

By ahardingMay 7, 2021Leave a comment

Problem Statement – Transportation investments produce different benefits for different members of the public. Decision makers often need to know how these benefits may be distributed, especially on traditionally underserved…

Comparative Analysis of the No-Build Alternative for High-Speed Rail Projects

By ahardingMay 7, 2021Leave a comment

TERI Database Administrator Notes:  Note recommended at present time by 2009 Environmental Process Subcommittee.  Problem Statement Several high-speed rail projects in the U.S. were proposed, analyzed, assessed, but were not built,…

CSS and Sustainability in Transportation

By ahardingMay 7, 2021Leave a comment

This research would focus on defining sustainable transport including understanding how to evaluate transportation options across all issues of sustainability including economic, environmental and equity.  A synthesis of current practice…

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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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