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Congestion Mitigation and Air Quality Improvement (CMAQ) Program

The Congestion Mitigation and Air Quality Improvement (CMAQ) program provides a funding source for State and local governments to fund transportation projects and programs to help meet the requirements of the Clean Air Act (CAA) and its amendments and is codified at 23 USC Sec 149. CMAQ funds support state- and locally selected transportation projects that reduce mobile source emissions in both current and former areas designated by the U.S. Environmental Protection Agency (EPA) to be in nonattainment or maintenance of the national ambient air quality standards for ozone, carbon monoxide, and/or particulate matter.

Many types of projects are eligible under the CMAQ program including electric vehicles and charging stations, diesel engine replacements and retrofits, transit improvements, bicycle and pedestrian facilities, shared micromobility projects including shared scooter systems, and more. In addition to improving air quality and reducing congestion, CMAQ projects can improve equitable access to transportation services, improve safety, and promote application of new and emerging technologies.

Related Resources

CMAQ Project Spotlight

Profile 1 - MBTA Green Line
MBTA Green Line
Profile 2 - CNG Refuse
CNG Refuse
Profile 3 - CNG Refueling
CNG Refueling
Profile 4 - Georgia Commute
Georgia Commute
Profile 5 - Hybrid Electric Ferry
Hybrid Electric Ferry
Updated: 5/30/2023
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