Regulations last checked for updates: Sep 29, 2023

Title 23 - Highways last revised: Jun 05, 2023
authority: 23 U.S.C. 106,109,112,115,315,320,and; Sec. 1303 of Pub. L. 112–141, 126 Stat. 405; Sec. 1501 and 1503 of Pub. L. 109–59, 119 Stat. 1144; Pub. L. 105–178, 112 Stat. 193; Pub. L. 104–59, 109 Stat. 582; Pub. L. 97–424, 96 Stat. 2106; Pub. L. 90–495, 82 Stat. 828; Pub. L. 85–767, 72 Stat. 896; Pub. L. 84–627, 70 Stat. 380; 23 CFR 1.32 and 49 CFR 1.85