Datasets

3 datasets

U.S Department of Transportation

Congestion Mitigation and Air Quality (CMAQ) - Public Access System

All 50 states and the District of Columbia submit annual reports of their CMAQ project obligations in March of every year. The FHWA uses these yearly submissions to maintain an active database of CMAQ investments,…

HTML

Updated Oct 25, 2026

U.S Department of Transportation

Long-Term Pavement Performance (LTPP)

Long-term Pavement performance, construction, traffic, and environmental data for more than 2500 pavement sections in the United States and Canada. More than a dozen experimental designs address specially constructed…

HTML

Updated Oct 25, 2026

Loudoun County

Who Maintains My Street?

Loudoun Road Maintenance: This application displays ownership and maintenance responsibility for roads in Loudoun County, Virginia.

HTML
ArcGIS

Updated Oct 10, 2026