23 CFR § 657.1
Purpose
May 21, 2020
To prescribe requirements for administering a program of vehicle size and weight enforcement on the Interstate System, and those routes which, prior to October 1, 1991, were designated as part of the Federal-aid primary, Federal-aid secondary, or Federal-aid urban systems, including the required annual certification by the State.
[72 FR 7747, Feb. 20, 2007]