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.

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

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).

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

Traction tires are a special type of tire

manufactured with at least 1/8 of an inch tread. Traction tires are usually marked with a mountain/snowflake symbol, the letters M+S or “All Season.”

Carry chains, practice before leaving

Requiring chains keeps traffic moving during storms rather than closing a pass or roadway.

Prep your car. Fill up your gas tank,

pack jumper cables, ice scraper, warm clothing, snacks and water.