Congestion Mitigation and Air Quality Improvement program (CMAQ) funds are apportioned to States which have ozone and/or carbon monoxide nonattainment areas (based on the nonattainment classification factor). Such projects are used to attain national ambient area air quality standards with funding of $6 billion. Projects must contribute to the reduction of air pollutants by implementing Transportation Control Measures (TCM), such as carpool lanes, Transportation Demand Management (TDM) measures and transit (transit related project or program contained in an approved SIP). Other projects and programs may qualify if, after consultation with the Environmental Protection Agency, FHWA determines that they are likely to contribute to the attainment of a National Ambient Air Quality Standard.