Transportation agency managers have expressed concern that reduced mowing practices, such as those that benefit pollinators, may increase vehicle collisions with large mammals like deer, thereby reducing driver safety. Though…
Wildlife crossings such as overpasses, underpasses, or culverts designed to help animals avoid vehicle traffic can reduce wildlife-vehicle collisions, protect animals, and help maintain their habitat connectivity. While the benefits…
Spurred by information on the increasing urgency of mitigating climate change, as well as an injection of federal funding into carbon emissions reduction strategies, transportation agencies are increasingly developing and…
Comparisons of alternative build and no-build scenarios in project-level air quality analyses for NEPA and conformity typically focus on comparisons of emissions and/or ambient concentrations of specific pollutants, including greenhouse…
FHWA regulations for highway traffic noise (23 CFR 772) outline procedures for traffic noise analysis and noise abatement requirements for State DOT highway projects. The regulations stipulate that noise abatement…
State Departments of Transportation (DOTs) conduct project-level air quality analyses for the National Environmental Protection Act (NEPA) and to meet the requirements of the Environmental Protection Agency’s (EPA) transportation conformity…
Is there a negative perception of DOTs if the mowing schedule leaves taller vegetation throughout more of the year and later into the growing season? Does education about the reasoning…
Interseeding (also known as overseeding) can increase flowering plant diversity in grass-dominated stands of vegetation but has rarely been used on roadsides. Research is needed to better understand how to…
Background DOTs routinely receive requests to add new products and materials to their lists of approved products, including culvert repair products and materials used for road and bridge repair. Many…
Transportation-related infrastructure affects wildlife in a variety of ways by altering the physical environment. These alterations often negatively impact wildlife through displacement, barriers to movement, and increased mortality. They can…