Regulations last checked for updates: Apr 19, 2024

Title 23 - Highways last revised: Jan 18, 2024
authority: 23 U.S.C. 137,142,149; sec. 4 of Pub. L. 97–134, 95 Stat. 1699; secs. 118, 120, and 163 of Pub. L. 97–424, 96 Stat. 2097; 49 CFR 1.48(b) and 1.51(f)
source: 50 FR 33917, Aug. 22, 1985, unless otherwise noted.