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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
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      • Context Sensitive Solutions
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  • News
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    • Practitioner’s Handbooks
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      • NCHRP 25-25
      • TERI Database
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Water Quality/Wetlands

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Snow plow covered in snow

MnDOT Trying to Cut Back on Its Salt

By September 9, 2021

When it snows in Minnesota, drivers want the roads and bridges cleared – now. However, simply dumping mass amounts of salt on the roads is an outdated practice for the…

Exhibit at aquarium about not littering

Tennessee DOT Helps Fund Two Trash Exhibits at Aquarium

By ahardingApril 28, 2021

A pair of new exhibits at the Tennessee Aquarium funded by the grants from the Tennessee Department of Transportation illustrate how microplastics and other roadside trash can negatively affect the…

Caltrans worker on boat

Video: Caltrans Uses Boat Fleet to Clear Waterways of Trash

By ahardingFebruary 10, 2021

The California Department of Transportation recently put together a video highlighting how its boat fleet in the San Francisco Bay Area – typically used to transport engineers, biologists, and maintenance…

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…

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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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