Transportation management area (TMA) means an urbanized area with a population over 200,000 (as determined by the latest decennial census) and designated by the Secretary of Transportation or other area when TMA designation is requested by the Governor and the MPO (or affected local officials), and officially designated by the Secretary of Transportation.
23 CFR § 420.103
Unless otherwise specified in this part, the definitions in 23 U.S.C. 101 are applicable to this part. As used in this part: