Route & commercial vehicle restrictions

Restrictions and requirements for oversize and overweight commercial vehicles operating on Washington state roadways. Commercial vehicle drivers are responsible for verifying route restrictions, overhead height clearances, and other requirements.

Sign up for email or text updates. Freight alerts in the subscription topics news will have new commercial vehicle:

  • Oversize restrictions
  • Night closures
  • Lane closures

Bridge clearance

Check for restrictions and overhead clearance on your route.

Current restrictions

Restrictions for oversize/overweight vehicles on state roadways, bridges and structures.

Commercial vehicle chain requirements

All vehicles over 10,000 pounds GVW shall carry a minimum of 2 extra chains for use in the event that road conditions require the use of more chains or that chains in use are broken or otherwise made useless, WAC 204-24-050 (2) (f).

Curfew hours & holiday restrictions

Days when travel is restricted: Vehicles operating under special permit for overweight/over dimensional, except as provided for in Washington Administrative Code (WAC 468-38-075), may be restricted from the state highways on the holidays.

Emergency vehicles posted bridge restrictions

Emergency vehicles posted bridge restrictions list for Emergency Vehicles that are above the listed limits for posted bridges and structures.

Contact information

Commercial Vehicle Services
Permit information
CVSpermits@wsdot.wa.gov
360-704-6340

Performance highlights from the Gray Notebook

8,683 animals crossed the Snoqualmie Pass East Project area

as recorded by WSDOT and partners in 2020 and 2021.

46% increase in Amtrak Cascades ridership to 251,000 passengers

in 2021 compared to 172,000 in 2020.

Nine wetland and stream mitigation sites across 32.7 acres added

to our monitoring program in 2021 to help offset climate change impacts.