Regulations last checked for updates: Sep 26, 2021

Title 23 - Highways last revised: Sep 20, 2021
authority: 23 U.S.C. 103(c), 109(h), 138, 325, 326, 327 and 204(h)(2); 49 U.S.C. 303; Section 6009 of the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (Pub. L. 109-59, Aug. 10, 2005, 119 Stat. 1144); 49 CFR 1.81 and 1.91; and, Pub. L. 114-94, 129 Stat. 1312, Sections 1303 and 11502
source: 73 FR 13395, Mar. 12, 2008, unless otherwise noted.