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Center for Environmental Excellence | AASHTO
Center for Environmental Excellence | AASHTO
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  • Laws & Agreements
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    • 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
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      • Environmental Justice
      • Invasive Species/Vegetation
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      • Traffic Noise
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      • Context Sensitive Solutions
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      • NCHRP 25-25
      • TERI Database
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Water Quality/Wetlands

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Child on computer

Hawaii DOT Launches Storm Water Online Learning Series for Kids

By ahardingJanuary 6, 2021

Protecting the ocean, rivers, and streams from pollution is the focus of a new online learning series for kids launched by the Hawaii Department of Transportation’s Storm Water Management Program.…

Road in the snow

Filling Pavement Temperature Data Gaps to Prevent Overuse of Road Salt

By ahardingDecember 23, 2020

Could more accurate and consistent pavement temperature data held reduce the overuse of salt and other ice-melting chemicals during winter operations? The Iowa Department of Transportation plans to find out…

Dan McKernan

Video: WSDOT Makes Bridge Safer for Human Travelers & Fish Species

By ahardingOctober 28, 2020

The Washington State Department of Transportation recently wrapped up a roughly $13 million fish barrier correction project – resulting in a new 440-foot bridge that spans Kilisut Harbor along State Route 116.…

New construction along coast of city

Removal of Causeway Segment Helps Florida DOT Restore Tampa Bay

By Amber GarnettNovember 18, 2019

The Florida Department of Transportation has come up with a unique solution to help restore water quality and habitat in Tampa Bay: removing over 200 feet of a land bridge…

man reads map on mountainous riverbank at sunrise

Colorado DOT Employs Innovative Distillation Approach to Treat Wastewater

By Amber GarnettApril 7, 2019

An innovative distillation treatment system is helping the Colorado Department of Transportation (CDOT) treat greywater from the floor drains of its maintenance facilities. This new system not only is showing…

Bare trees reflect in small woodland pond

New Hampshire DOT Pioneers New Approach to Construction Stormwater Management

By Amber GarnettDecember 12, 2016

The New Hampshire Department of Transportation’s award-winning work managing construction stormwater to protect two water bodies adjacent to Interstate 93 has been a successful demonstration of innovative techniques under real-world…

Tree, forest, cloudy sky, and grasses reflected in the waters of a swamp wetland landscape

Florida DOT’s Programmatic Approach to Wetlands Mitigation

By Amber GarnettFebruary 22, 2015

More effective mitigation for unavoidable wetland losses from transportation projects in Florida is being achieved through a unique programmatic mitigation approach developed by the Florida Department of Transportation. The state’s…

Greenery and grasses lead into large bog

Arizona DOT Provides Guidance for CWA Section 404/401 Permits, Certification

By Amber GarnettJanuary 7, 2014

The Arizona Department of Transportation has developed a manual to ensure compliance, provide consistency, and increase awareness of permitting and certification requirements for its projects under Sections 404 and 401…

Fawn walks through wetland area

Watershed Resources Registry Helps Maryland DOT Identify Priority Restoration, Mitigation Sites

By Amber GarnettJune 9, 2013

An online tool developed by transportation and environmental agencies is helping transportation officials in Maryland identify watershed restoration and mitigation opportunities for projects. The Watershed Resources Registry was developed by the…

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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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