23 CFR 658.15 - Width.
(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.
(b) The provisions of paragraph (a) of this section do not apply to special mobile equipment as defined in § 658.5.
(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.
Title 23 published on 2014-04-01
no entries appear in the Federal Register after this date.