Washington CMV Compliance Guide
WA DOT regulations for commercial motor vehicles
WSDOT Commercial VehiclesOfficial WA DOT websiteOverview
WSDOT and the Washington State Patrol handle commercial vehicle enforcement. Washington is a major Pacific Northwest freight state with I-5, I-90, and I-82 as key corridors. The Ports of Seattle and Tacoma handle significant container traffic. The state also has substantial agricultural and timber freight.
Inspection & Enforcement Program
Washington operates weigh stations and mobile enforcement units. WSP officers perform Level I through Level III inspections. The state has enforcement presence at ports of entry and on major Interstate corridors.
Weight Limits & Oversize/Overweight
Washington follows federal weight limits of 80,000 lbs GVW on Interstate highways. On state highways, Washington allows higher weights with specific configurations. The state has specific weight restrictions on mountain passes (Snoqualmie Pass on I-90, Stevens Pass on US-2).
Washington-Specific Requirements
- Washington imposes a state-specific commercial vehicle weight fee based on the vehicle's declared gross weight.
- Mountain pass requirements include mandatory chain-up areas and traction devices during winter months.
- The state has specific requirements for logging trucks and forest road operations.
- Washington's Good To Go! toll system is required for commercial vehicles on toll routes.
- The state enforces specific emissions requirements for diesel vehicles in certain areas.
Contact
WSDOT Commercial Vehicles: (360) 704-6340
Federal Requirements That Apply in Washington
In addition to Washington-specific regulations, all federal DOT and FMCSA requirements apply to commercial vehicles operating in WA. These guides cover each federal requirement in detail:
This information is provided as a general reference. State regulations change frequently. Always verify current requirements with the Washington DOT or your compliance advisor before relying on any information presented here.