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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 CEE 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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  2. Research Idea (TERI)

Traffic Analysis Data Age and Relevant Changes Traffic Updates Cause to Project Design

By ahardingMay 7, 2021Leave a comment

In NEPA analysis that goes on for numerous years for transportation projects, the traffic data is updated with analytical consequences periodically throughout the process. But how often do these expensive…

(USGS Research Proposal) Underpass Evaluation and Enhancement for Small Vertebrates and Invertebrates

By ahardingMay 7, 2021Leave a comment

Background and Objectives Roads of different sizes, substrates, and traffic volumes have been shown to inhibit the movement of large mammals, small mammals, herpetofauna, and invertebrates (Brehme et al. 2013).…

Minimizing the Risk of Human and Bighorn Sheep Mortality Along Roadways in Southern California

By ahardingMay 7, 2021Leave a comment

In 1998, the Peninsular bighorn sheep (PBS) was federally listed as endangered throughout its distribution in the Peninsular Ranges of California. As identified by the PBS Recovery Plan (USFWS 2000),…

Best Management Practices for addressing the Migratory Bird Convention Act (Canada)/Migratory Bird Treaty Act (U.S.) and its effect on roadway and bridge construction and rehabilitation

By ahardingMay 7, 2021Leave a comment

Migratory birds establish nests on bridge structures and within roadway r-o-w’s. Restricted activity periods due to nesting restrict construction, maintenance and rehabilitation of roads and bridges leading to increased costs.…

Evaluating Northern Long Eared Bat use of trees along highway corridors

By ahardingMay 7, 2021Leave a comment

Very little information is available on the Northern Long Eared bat’s likely use of vegetation flanking highway corridors. The objective of this research is to review existing data on the…

Survey and compilation of on- and off-structure bat mitigation approaches and designs

By ahardingMay 7, 2021Leave a comment

Survey of DOTs, MPOs, LPAs and NGOs regarding bat management strategies, mitigation on and off structures, effectiveness, and general cost benefit analysis including maintenance implications and costs.

Long-Term Cost/Benefit Analysis of Traditionally Sized Structures versus Aquatic Wildlife Friendly Structures and Culvert Replacement Cost Estimator

By ahardingMay 7, 2021Leave a comment

Traditionally, state and local governments install the smallest structure necessary to pass a certain measurable flow as required by local, state and federal rules. Structures that are sized to bankfull-width…

Survey and compilation of effective designs for promoting sensitive reptile and amphibian crossings of roadway corridors

By ahardingMay 7, 2021Leave a comment

Survey of DOTs, MPOs, LPAs and NGOs regarding designs for promoting sensitive reptile and amphibian crossings of roadway corridors, effectiveness, and general cost benefit analysis including maintenance implications and costs.…

The Efficacy of Treating Highway Runoff to Meet Watershed TMDL Goals

By ahardingMay 7, 2021Leave a comment

Background: State Departments of Transportation (DOTs) are being named as Designated Management Agencies in Total Maximum Daily Load (TMDL) management plans. This designation often brings with it the obligation for…

Survey of wildlife-friendly temporary and permanent erosion control products and approaches

By ahardingMay 7, 2021Leave a comment

Survey and compilation of information on erosion control products that are safe for sensitive reptiles and amphibians (netting-free) and erosion control treatments (alternatives to rip rap) that do not block…

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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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