Each state is required under 49 U.S.C. 5304(g) to develop a statewide transportation improvement program (STIP) covering a period of at least four years. The STIP is a staged, multi-year, statewide intermodal program of transportation projects, consistent with the statewide transportation plan and planning processes as well as metropolitan plans, transportation improvement programs (TIPs), and planning processes. The STIP must be developed in cooperation with the metropolitan planning organizations (MPOs), public transit providers, and any Regional Transportation Planning Organizations (RTPO) in the state, and must be compatible with the TIPs for the state's metropolitan areas.
23 CFR 450 - Planning Assistance and Standards - Federal transportation planning regulations (this link goes to the highway version--the transit version, adopted by FTA at 49 CFR 613, is an identical copy which incorprates this section by reference).
FTA Circular 8100.1C - Program Guidance for Metropolitan Planning and State Planning and Research Program Grants - FTA program guidance for metropolitan planning and state planning and research program grants.
FAST Act Fact Sheet: Metropolitan, Statewide, & Non-Metropolitan Planning - Brief FTA fact sheet on the planning provisions in the FAST Act.
FHWA FAST Act Fact Sheet: Metropolitan Planning - FHWA fact sheet on the metropolitan planning provisions of the FAST Act.
U.S. Code Title 49, Chapter 53 - Public Transportation - This is the public transportation section of U.S. Code. The Metropolitan Transportation Planning statute is found at Section 5303; Statewide Transportation Planning is found at Section 5304; and Planning Programs are found at Section 5305. The Metro and Statewide Planning sections are identical to the corresponding sections of Federal Highways code, 23 U.S.C. 134 and 135.
Additional resources related to Metropolitan, Statewide & Non-Metropolitan Planning