Alabama

Alabama 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; strict enforcement.

Height: 13 ft 6 in. Width: 8 ft 6 in. Trailer length: 57 ft (semitrailer). Overall combination length: No overall limit for tractor-semitrailer.

Single-trip and annual oversize/overweight permits available through ALDOT Fees: Single-trip: $25+; Annual: varies by weight. Mississippi oversize/overweight permits are honored under reciprocal agreements. Verify specific terms before travel. Apply online: https://alpass.dot.state.al.us/ Enforcement: Weigh stations and portable scales; $0.05 per pound overweight fine.

Agricultural: Agricultural vehicles exempt on non-interstate roads when traveling between farm and market within 150 miles. 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 Alabama DOT page at https://www.dot.state.al.us/business/permits/osowPermits.html. Contact the Alabama Department of Transportation for specific routing questions.