23 C.F.R. § 470.105 Urban area boundaries and highway functional classification.
Title 23 - Highways
(a) Urban area boundaries. Routes on the Federal-aid highway systems may be designated in both rural and urban areas. Guidance for determining the boundaries of urbanized and nonurbanized urban areas is provided in the “Federal-Aid Policy Guide,” Chapter 4 [G 4063.0], dated December 9, 1991.1 1 The “Federal-aid Policy Guide” is available for inspection and copying as prescribed in 49 CFR part 7, Appendix D. (b) Highway Functional Classification. (1) The State transportation agency shall have the primary responsibility for developing and updating a statewide highway functional classification in rural and urban areas to determine functional usage of the existing roads and streets. Guidance criteria and procedures are provided in the FHWA publication “Highway Functional Classification—Concepts, Criteria and Procedures.”2 2 This publication, revised in March 1989, is available on request to the FHWA, Office of Environment and Planning, HEP–10, 400 Seventh Street, SW., Washington, DC 20590. (2) The results of the functional classification shall be mapped and submitted to the Federal Highway Administration (FHWA) for approval and when approved shall serve as the official record for Federal-aid highways and the basis for designation of the National Highway System.
Title 23: Highways
PART 470—HIGHWAY SYSTEMS
Subpart A—Federal-aid Highway Systems
§ 470.105 Urban area boundaries and highway functional classification.
