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…
Background For purposes of the National Environmental Policy Act (NEPA) process, Federal agencies have initiated efforts on how to assess the impacts of potential GHG emissions from proposed Federal actions…
This study would develop recommendations for future research topics for air quality, climate change and energy, i.e., a research roadmap. Recommendations would be developed to cover all available NCHRP funding…
NCHRP 25-25 Task 104 recently completed updates to templates for a programmatic agreement (PA) for project-level air quality analyses for carbon monoxide (CO). The templates were designed to be customized…
Air pollution across the nation has improved significantly over the past 20 years. Nonetheless, in highly populated area, sensitive populations living adjacent to high volume roadways are exposed to air…
A major update to the MOVES emission model used in air quality analyses of transportation improvement projects is expected later this year, which may result in significant changes to forecast…
Traffic volumes dropped substantially across the nation as a result of stay-at-home policies implemented during the coronavirus pandemic, resulting in improved air quality which in turn can lead to improved…