Pennsylvania

Pennsylvania 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; many aging bridges have posted lower limits. Enforcement tolerance: No tolerance; strict enforcement statewide.

Height: 13 ft 6 in. Width: 8 ft 6 in. Trailer length: 53 ft (semitrailer). Overall combination length: No overall limit for tractor-semitrailer on National Network.

Oversize/overweight permits through PennDOT online system Fees: Single-trip: $25+; Annual: $100+. Montana oversize permits are not directly honored in Pennsylvania. You will need to obtain a Pennsylvania-specific permit for oversize/overweight loads. Apply online: https://www.penndot.pa.gov/Doing-Business/Motor-Carriers/Pages/default.aspx Enforcement: PSP and PennDOT enforcement; aging infrastructure means strict weight enforcement; high fines.

Agricultural: Agricultural vehicles exempt on state highways; farm equipment has special width and weight provisions. Timber/Forestry: Timber trucks allowed higher weights on designated state routes.

Spring thaw restrictions on posted roads; reduced weights during thaw season (February-April). Check with the state DOT for current postings and dates before planning your route.

For the most current weight and size regulations, permit applications, and seasonal restriction updates, visit the official Pennsylvania DOT page at https://www.penndot.pa.gov/Doing-Business/Motor-Carriers/Pages/default.aspx. Contact the Pennsylvania Department of Transportation for specific routing questions.