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Formula

Flexible Funding Programs - Congestion Mitigation and Air Quality Program - 23 USC 149

CMAQ provides funding to areas in nonattainment or maintenance for ozone, carbon monoxide, and/or particulate matter. States that have no nonattainment or maintenance areas still receive a minimum apportionment of CMAQ funding for either air quality projects or other elements of flexible spending.  Funds may be used for any transit capital expenditures otherwise eligible for FTA funding as long as they have an air quality benefit.

Flexible Funding Programs - National Highway Performance Program - 23 USC 119

Provides support for the condition and performance of the National Highway System (NHS), for the construction of new facilities on the NHS, and to ensure that investments of Federal funds in highway construction are directed to support progress toward the achievement of performance targets established in a State’s asset management plan for the NHS.