Congestion Mitigation and Air Quality Program (CMAQ)

CMAQ Funding in the Atlanta Region

The Congestion Mitigation and Air Quality Program (CMAQ) is a federal program focused on reducing congestion and improving air quality to help meet the requirements of the Clean Air Act. CMAQ is administered by the Atlanta Regional Commission through a competitive selection process and is authorized under MAP-21 (32 U.S.C. 149).

2013 Project Call Documentation

2017 Project Call – Schedule to Be Determined

Atlanta Region CMAQ Calculator

In an effort to standardize best practices in evaluating CMAQ projects, the ARC developed a modular CMAQ emissions calculator. The tool highlights changes in NOx, VOC, PM2.5, and greenhouse gas emissions and, where applicable, vehicle hours of delay and vehicle miles traveled. It calculates benefits for 16 types of strategies including, but not limited to:

  • Transit enhancements,
  • System operations strategies,
  • Alternative fuels,
  • Demand management strategies, and
  • Bicycle and pedestrian investments.

The calculator is currently calibrated only for the Atlanta region but can be customized and adopted for other regions throughout the country.

For questions about the calculator or documentation please contact David D’Onofrio at 404.463.3268.


The calculator was developed by Cambridge Systematics, Inc. using data and input parameters specifically tailored to the Atlanta Region for use by the Atlanta Regional Commission (ARC); any subsequent use of the Calculator by anyone other than ARC shall be at the sole risk of the user.

CMAQ Resources

CMAQ Calculator Download