Directional fencing is an important component of wildlife crossing designs. When successful, fencing can guide animals to a safe crossing location and significantly reduce road mortality. Most current research is…
Wildlife-vehicle conflicts (WVC) are a major safety, mobility, and sustainability concern for transportation infrastructure. Cross-referencing WVC data across states with right-of-way (ROW) vegetation management may yield ROW maintenance recommendations that…
Fish passage barriers are a significant threat to the recovery of threatened and endangered fish and other aquatic species. There are often limitations to transportation funding that require the prioritization…
Culvert and bridge design involve safely passing floods and debris while minimizing instability and maintenance requirements. Culverts and bridges also have the potential to reduce wildlife-vehicle conflicts (WVC) by facilitating…
When a transportation project is undertaken, an air quality analysis may be required to meet federal and/or state requirements related to U.S. EPA transportation conformity regulations, NEPA, associated FHWA guidance,…
The objective of this project is to develop guidance on how to apply microscopic traffic simulation models to project level emissions analysis, focusing specifically on vehicle trajectory information. This project…
Background On January 18, 2017, the Federal Highway Administration (FHWA) published the final performance measure rule (PM3) under MAP-21. This rule, which took effect on May 20, 2017, established CMAQ…
A multi-disciplinary approach to building a national-level historic context for historic roads that will then be used to build state-level historic contexts. Using economy of scale, develop a historic context…
In the absence of national or state best practices and recommended design guidance, the objectives of this research, include: • Document current and emerging regional and nation-wide best practices, case…
The most commonly used fully permeable pavements are porous asphalt (PA) (excluding open-graded friction courses), pervious concrete (PC), and permeable interlocking concrete pavement (PICP). Unlike impervious pavements, permeable pavements must…