Federal Size Regulations for Commercial Motor Vehicles

U.S. Department of Transportation

Federal Highway Administration

Printable Version [PDF 1.1MB]

 You will need the Adobe Acrobat Reader to view this PDF. 

• TABLE OF CONTENTS

  • FEDERAL SIZE REGULATIONS FOR COMMERCIAL MOTOR VEHICLES (CMVs)

  • WIDTH REQUIREMENTS

  • LENGTH REQUIREMENTS

    • Truck Tractor-Semitrailer Combinations

    • Truck Tractor-Semitrailer-Trailer Combinations

    • Buses

    • Grandfathered Semitrailer Lengths

    • Specialized Equipment

      • Automobile and Boat Transporter Combinations

      • B-Train Combinations

      • Beverage Semitrailers

      • Maxi-Cube Vehicles

      • Saddlemount and Saddlemount with Fullmount Combinations

      • Dromedaries

      • Trucks or Straight Trucks

      • Recreational Vehicles

  • LENGTH AND WIDTH EXCLUSIVE DEVICES

  • NATIONAL NETWORK

  • REASONABLE ACCESS

  • ISTEA "FREEZE"