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]
source: 45 FR 52368, Aug. 7, 1980; 62 FR 62261, Nov. 21, 1997, unless otherwise noted.
cite as: 23 CFR 657.1