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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

Archived

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  2. Research Idea (TERI)

Recommended Techniques and Best Practices to Reduce, Minimize or Mitigate Transportation Impacts on Watershed Functions and Values

By ahardingMay 7, 2021Leave a comment

TERI Administrator Note: Selected for FY12 NCHRP funding as NCHRP 25-37 RESEARCH PROBLEM STATEMENT   This problem statement was identified by the Natural Systems and Ecological Communities Subcommittee of AASHTO’s Standing…

Impact of Daily Parking Pricing on Modal Choice

By ahardingMay 7, 2021Leave a comment

The ability to manage parking has substantially changed in recent years.  Parking can now be charged using credit/debit cards, cell phones as other pre-paid options.  This allows for employers to…

Optimization of the Subsurface Gravel Wetland for Linear ROW and Pond Retrofits for Nutrient Controls

By ahardingMay 7, 2021Leave a comment

Subsurface gravel wetlands(SGW) have proven successful as a nitrogen control strategies however costly to construct. SGW have been shown to remove >95% of NO3-N and >55% removal  of TP and…

Comparison of Native Grasses to Traditional Plantings for Roadside Stabilization

By ahardingMay 7, 2021Leave a comment

Stabilization of roadsides after construction is critical to protecting water quality, public safety and the longevity of the project.  Unfortunately, current erosion control seed mixes include invasive exotic species.  The…

Meeting the New EPA Effluent Limitations Guideline for Construction Site Discharge Turbidity: Effectiveness of Different Turbidity Control Systems and Monitoring Methods

By ahardingMay 7, 2021Leave a comment

Background   On December 1, 2009, the United States Environmental Protection Agency (EPA) released their final rule on the effluent limitation guidelines for stormwater discharges from construction sites.  Effluent guidelines…

Accuracy of Traffic Forecasting Over Time in Environmental Studies

By ahardingMay 7, 2021Leave a comment

Analyze the accuracy of traffic forecasting over time, data that was used in environmental analysis/studies.  For example, a 1980 traffic study for a particular project looked at the traffic numbers…

Effects of High Levels of Erosion Control: Mulch & Polyacrylamides (PAM) Use Over Bare Soil Not Actively Worked for 3 Days

By ahardingMay 7, 2021Leave a comment

Cost of this vs. ditch and basin treatments, maintenance.

Alternative Basin Designs for Small Bridge Projects and Other Environmentally Sensitive Areas (that would typically require 1.5-inch skimmers with small orifices)

By ahardingMay 7, 2021Leave a comment

Select several of these small bridges that are being let and re-design, install and monitor the discharge from the standard skimmer basin (x2) vs.  a solid dam with a weir…

Effects of Sodium Chloride on Drinking Water Reservoirs (Resulting from Roadway De-Icing Operations)

By ahardingMay 7, 2021Leave a comment

Research should include an analysis of current sodium chloride concentrations existing in reservoirs which support a water supply for the general public.  Impact of runoff to these reservoirs and the…

Promoting the Ability of Sensitive Reptiles and Amphibians to Cross Highway Corridors

By ahardingMay 7, 2021Leave a comment

More than 25 amphibians and reptiles are listed as threatened or endangered in California.  Highways pose movement barriers for many these species. As California’s human population increases and climate changes…

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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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