District of Columbia

District of Columbia 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 tolerance; urban environment requires strict compliance.

Height: 13 ft 6 in. Width: 8 ft 6 in. Trailer length: 53 ft (semitrailer on designated routes). Overall combination length: 55 ft combination on most streets.

Special hauling permits required for oversize/overweight vehicles; contact DDOT Fees: Single-trip: $50+; varies by load. Massachusetts oversize permits are not directly honored in District of Columbia. You will need to obtain a District of Columbia-specific permit for oversize/overweight loads. Apply online: https://ddot.dc.gov/page/truck-and-bus-route-map Enforcement: Strict enforcement on truck routes; significant fines for off-route violations.

For the most current weight and size regulations, permit applications, and seasonal restriction updates, visit the official District of Columbia DOT page at https://ddot.dc.gov/page/truck-and-bus-route-map. Contact the District Department of Transportation for specific routing questions.