(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.
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