Regulations last checked for updates: Sep 27, 2021

Title 23 - Highways last revised: Sep 20, 2021
authority: Section 1301 of the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (Pub. L. 109-59; 119 Stat. 1144); 23 U.S.C. 315; 49 CFR 1.48
source: 73 FR 63370, Oct. 24, 2008, unless otherwise noted.