StacksVerified U.S. regulatory reference

23 CFR §658.15

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)No State shall impose a width limitation of more or less than 102 inches, or its approximate metric equivalent, 2.6 meters (102.36 inches) on a vehicle operating on the National Network, except for the State of Hawaii, which is allowed to keep the State's 108-inch width maximum by virtue of section 416(a) of the STAA.
  2. (b)The provisions of paragraph (a) of this section do not apply to special mobile equipment as defined in § 658.5.
  3. (c)Notwithstanding the provisions of this section or any other provision of law, a State may grant special use permits to motor vehicles, including manufactured housing, that exceed 102 inches in width.