Title 49 › Subtitle SUBTITLE VI— - MOTOR VEHICLE AND DRIVER PROGRAMS › Part PART B— - COMMERCIAL › Chapter CHAPTER 311— - COMMERCIAL MOTOR VEHICLE SAFETY › Subchapter SUBCHAPTER II— - LENGTH AND WIDTH LIMITATIONS › § 31113
States (except Hawaii) must not set or enforce a rule that makes commercial trucks wider or narrower than 102 inches on most Interstate highways, on certain federal-aid highways that the U.S. Secretary of Transportation names (if those roads have lanes made to be at least 12 feet wide), or on certain primary federal-aid routes the Secretary approves for safety. Width measurements do not count safety or energy-saving devices the Secretary allows. A State can still give a special permit for a truck wider than 102 inches. A State could keep any rule it had on April 6, 1983, about trucks wider than 102 inches until the State writes a rule that follows this rule. A federal-aid road not included by June 5, 1984, can only be added if the state’s chief executive agrees. If a state’s chief executive (the governor) finds part of an Interstate cannot safely handle 102-inch vehicles (except buses), the governor may ask the Secretary to let the state set a lower width limit for that segment. Before asking, the governor must talk with local governments and any nearby states and look at possible alternate routes. The governor’s request must show safety evidence and consultation results. The Secretary will decide, must consider alternate routes, give people a chance to comment, and must decide about that segment within 120 days or notify Congress with reasons and a new date. Approved exemptions are included in the final or amended federal rules.
Full Legal Text
Transportation — Source: USLM XML via OLRC
Legislative History
Reference
Citation
49 U.S.C. § 31113
Title 49 — Transportation
Last Updated
Apr 6, 2026
Release point: 119-73