Arizona

Arizona 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: Limited tolerance on axle weights; no tolerance on GVW.

Height: 14 ft. Width: 8 ft 6 in. Trailer length: 57 ft 6 in (semitrailer). Overall combination length: 65 ft combination (75 ft with permit).

ADOT issues single-trip and annual oversize/overweight permits online Fees: Single-trip: $15; Annual: $90+. Colorado oversize/overweight permits are honored under reciprocal agreements. Verify specific terms before travel. Apply online: https://azdot.gov/motor-vehicles/commercial-driver-services/permits Enforcement: Weigh stations on major highways; portable enforcement.

Agricultural: Farm vehicles exempt within 25 miles of farm on non-interstate highways.

For the most current weight and size regulations, permit applications, and seasonal restriction updates, visit the official Arizona DOT page at https://azdot.gov/motor-vehicles/commercial-driver-services/permits. Contact the Arizona Department of Transportation for specific routing questions.