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Federal Regulations

Federal Size and Weight Regulations

• 23 CFR 657 [PDF 206KB]
• 23 CFR 658 [PDF 478KB]
  • Aerodynamic Device Compliance with 23 CFR 658.16(b) (4)
• Federal Size Regulations for Commercial Motor Vehicles [HTML, PDF 1.1MB]
• Bridge Formula Weights [HTML, PDF 1.7MB]

Federal Notices and Rulemakings on Vehicle Size and Weight

• Commercial Vehicle Width Exclusive Devices (includes Supplementary Notice of Proposed Rulemaking and Final Rulemaking on Recreational Vehicles)
• Designation of Dromedary Equipped Truck-Tractor-Semitrailers as Specialized Equipment
• Truck Size and Weight; Technical Correction (HTML, PDF 216KB)

Federal Motor Carrier Safety Administration

• Federal Motor Carrier Safety Regulations (FMCSR)