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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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Evaluating and Predicting the Effects of Vibration from Construction and Use of Transportation Structures on Buried Archaeological Deposits

By ahardingMay 7, 2021Leave a comment

Purpose of research is to determine the potential effect to buried archaeological deposits from the construction and subsequent operation of transportation facilities.  Because the typical method of archaeological mitigation (data…

Survey and Mapping of Invasive Species Population in Highways’ Rights-of-Way by Absence-Presence Sampling Methods

By ahardingMay 7, 2021Leave a comment

By law, Departments of Transportation are required to control noxious weeds along highway rights-of-way (ROWs). Beginning 2000, District 4 (D4) of Minnesota Department of Transportation (Mn/DOT) adopted a survey design…

Invasive Plant Species that Are Spread by Construction Vehicles

By ahardingMay 7, 2021Leave a comment

The management of invasive species is ineffective when the means of dissemination are unknown.   Construction vehicles are likely vectors for the spread of invasive plant species.  The use of construction…

Effects of Roads on the Copperbelly Water Snake (Nerodia Erythrogaster Neglecta)

By ahardingMay 7, 2021Leave a comment

TERI Database Administrator Notes:  Not recommended at present time by 2009 Natural Systems Subcommittee.  The copperbelly water snake (Nerodia erythrogaster neglecta), which is federally listed as threatened, occurs in the…

Green House Gas (GHG) Reduction Potential of Non-Motorized Transportation

By ahardingMay 7, 2021Leave a comment

About half of all trips taken in the US are 3 miles or less. Walking and bicycling could be an adequate alternative to driving for many of these trips. The…

Laser Ablation of Calcareous Shells and Skeletal Elements Coupled to Mass Spectroscopy as a Method of Determining the Spatial and Temporal Extent of Heavy Metal Pollution in Aquatic Species

By ahardingMay 7, 2021Leave a comment

Organisms pick up some heavy metals in proportion to their exposure in aquatic systems, they then deposit these elements along with calcium into their calcareous shells or skeleton. Many of…

Long-Term Cost/Benefit Analysis of Traditionally-Sized Structures versus Aquatic/Wildlife Friendly Structures

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…

Preventing Wildlife Kills on Railroads

By ahardingMay 7, 2021Leave a comment

Train-wildlife collisions are devastating to wildlife populations, and disproportionately so, to species such as moose, grizzly bear, wolverine, and wide-ranging carnivores in general, which have low reproductive rates.  Habitat fragmentation…

Transportation Conformity under EPA’s Revised 8-hour Ozone NAAQS

By ahardingMay 7, 2021Leave a comment

TERI Database Administrator Notes:  Not recommended at present time by 2009 Air Quality Subcommittee.  With so many new areas likely to be designated nonattainment under EPA’s revised 8-hour ozone standard,…

Modern Roundabouts, Toxic Emissions & Climate Change

By ahardingMay 7, 2021Leave a comment

Investigate the potential benefits of converting traditional cross intersections to modern roundbouts.

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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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