Congestion Mitigation and Air Quality (CMAQ) Improvement Program

The Congestion Mitigation and Air Quality (CMAQ) Improvement Program is part of the Competitive Programs that East-West Gateway Council of Governments (EWG) administers.  CMAQ projects, like all federally funded transportation projects, are included in the Transportation Improvement Program that EWG develops for the St. Louis region. The CMAQ program provides a flexible funding source to State and local governments for transportation projects and programs to help meet the requirements of the Clean Air Act. Funding is available to reduce congestion and improve air quality for areas, including the St. Louis region, that do not meet the National Ambient Air Quality Standards for ozone, carbon monoxide, or particulate matter (nonattainment areas) and for former non-attainment areas that are now in compliance (maintenance areas). This program is authorized by the current transportation law the Fixing America’s Surface Transportation (FAST) Act.

Eligible Activities

CMAQ funds can be used for projects such as:

  • Traffic flow improvements
  • Demand management
  • Shared ride services
  • Bicycle and pedestrian facilities
  • Transit vehicles/facilities
  • Operating assistance for new transit projects

CMAQ funds cannot be used for routine maintenance such as roadway resurfacing/reconstruction and projects that add new single occupant vehicle capacity vehicles.

Eligible Sponsors

CMAQ funds are available to eligible Illinois and Missouri sponsors in the jurisdictions in the St. Louis region.

East-West Gateway Region Map


Eligible applicants include:

  • A municipality
  • A county
  • A state
  • Bi-State Development/Metro
  • Madison County Transit District
  • Great Rivers Greenway

Other agencies, such as not-for-profit organizations, must partner with an entity listed above.

Project Funds

CMAQ projects are funded with both federal and local funds at the following levels:

Both Illinois and Missouri Projects

  • Up to 80% federal / 20% local funding for:
    • Preliminary engineering
    • Right of way acquisition
    • Construction
    • Construction engineering

2022 CMAQ Application Cycle

On November 5, 2021, EWG opened a call for projects for CMAQ applications in Illinois and Missouri with applications due February 10, 2021. In Illinois, 13 applications were received, requesting approximately $14.1 million in federal funds. In Missouri, 19 applications were received, requesting approximately $33.9 million in federal funds. At their May 2022 meetings, the Illinois and Missouri Transportation Planning Committees voted to recommend the following lists of CMAQ projects for inclusion in the FY 2023-2026 Transportation Improvement Program which was approved by the Board of Directors on August 31, 2022. The not recommended projects are included for informational purposes.

CMAQ Program Guidance

Project Applications

The 2023 STP-S and CMAQ call for projects concluded February 9, 2023.

The next TAP round will start April 21, 2023 and end July 21, 2023. More details will be forthcoming.


Contact EWG staff by phone at (314) 421.4220 or (618) 274.2750 or by email at