Tennessee

Tennessee interstate GVW limit: 80,000 lbs. Per-axle limits: Single axle 20,000 lbs, Tandem axle 34,000 lbs, Tridem axle 42,000 lbs. Federal bridge formula applies. Enforcement tolerance: No general tolerance on interstates.

Height: 13 ft 6 in. Width: 8 ft 6 in. Trailer length: 53 ft (semitrailer). Overall combination length: 65 ft combination.

Excess weight permits through TDOT Oversize & Overweight Permit Office; $20 base plus 6 cents per ton-mile Fees: Single-trip: $20+ (plus ton-mile fee); Annual: $100+. District of Columbia oversize permits are not directly honored in Tennessee. You will need to obtain a Tennessee-specific permit for oversize/overweight loads. Apply online: https://www.tn.gov/tdot/traffic-operations-division/oversize---overweight-permits.html Enforcement: THP and TDOT enforcement; weigh stations; fines based on overweight percentage.

Agricultural: Agricultural vehicles exempt on state highways; farm products haulers have special provisions. Timber/Forestry: Timber vehicles allowed higher weights on designated state roads.

For the most current weight and size regulations, permit applications, and seasonal restriction updates, visit the official Tennessee DOT page at https://www.tn.gov/tdot/traffic-operations-division/oversize---overweight-permits.html. Contact the Tennessee Department of Transportation for specific routing questions.