CFR›Title 23›Chapter I›Part 470 ContainsSubparts A–CCorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 PART 470—HIGHWAY SYSTEMS Subparts A Subpart A—Federal-aid Highway Systems Sections 470.101–470.115; Appendices A–D B-C Subparts B-C [Reserved] Authority23 U.S.C. 103(b)(2), 103(c), 134, 135, and 315; and 49 CFR 1.85.Source40 FR 42344, Sept. 12, 1975, unless otherwise noted. Redesignated at 41 FR 51396, Nov. 22, 1976. Previous 460 Part 460—Public Road Mileage for Apportionment of Highway Safety Funds Next 490 Part 490—National Performance Management Measures