Washington

Washington interstate GVW limit: 80,000 lbs. State highways allow up to 105,500 lbs with proper axle configuration. Per-axle limits: Single axle 20,000 lbs, Tandem axle 34,000 lbs, Tridem axle 42,000 lbs. Federal bridge formula on interstates; Washington allows higher GVW on state routes with extra axles. Enforcement tolerance: No general tolerance on interstates.

Height: 14 ft. Width: 8 ft 6 in. Trailer length: 53 ft (semitrailer). Overall combination length: 75 ft combination.

Self-issue permits available through WSDOT online system for standard oversize/overweight loads Fees: Single-trip: $30; Annual: $100+. Pennsylvania oversize permits are not directly honored in Washington. You will need to obtain a Washington-specific permit for oversize/overweight loads. Apply online: https://wsdot.wa.gov/travel/commercial-vehicles/commercial-vehicle-permits/self-issue-permit Enforcement: WSP and WSDOT enforcement; weigh-in-motion technology; fines per pound overweight.

Agricultural: Agricultural vehicles exempt on state highways during harvest; farm implements have width exemptions. Timber/Forestry: Log trucks allowed up to 105,500 lbs on designated state routes.

Spring thaw restrictions on posted mountain and rural routes; reduced weights during breakup. 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 Washington DOT page at https://wsdot.wa.gov/travel/commercial-vehicles/. Contact the Washington State Department of Transportation for specific routing questions.