Congestion Mitigation and Air Quality (CMAQ) Improvement Program

The CMAQ Program provides funding to state departments of transportation (DOTs), local governments, and transit agencies for projects and programs that help meet the requirements of the Clean Air Act by reducing mobile source emissions and regional congestion on transportation networks. Eligible activities include transit improvements, travel demand management strategies, congestion relief efforts (such as high occupancy vehicle lanes), diesel retrofit projects, alternative fuel vehicles and infrastructure, and medium- or heavy-duty zero emission vehicles and related charging equipment. Projects supported with CMAQ funds must demonstrate emissions reductions, be located in or benefit a U.S. Environmental Protection Agency-designated nonattainment or maintenance area, and be a transportation project. For more information, see the Bipartisan Infrastructure Law CMAQ fact sheet and CMAQ Improvement Program website.

(Reference Public Law 117-58, Public Law 112-141, and 23 U.S. Code 149 and 151)

Jurisdiction: Federal

Type: Incentives

Agency: U.S. Department of Transportation

Enacted: Aug 10, 2005

Amended: Nov 15, 2021

Technologies: Biodiesel, Ethanol, EVs, Hydrogen Fuel Cells, Idle Reduction, Natural Gas, PHEVs, Propane (LPG)

See all Federal Laws and Incentives.