Washington Tire Chain Laws
$500 flat, including all statutory assessments (RCW 47.36.250). From about November 1 to April 1, vehicles over 10,000 lbs must carry enough chains plus two extra, and mount them when WSDOT posts the requirement. Approved traction tires do not substitute for a heavy truck. Chains must be metal or cable, not plastic. Watch I-90 Snoqualmie, US-2 Stevens Pass, and SR-410 Chinook Pass. WSDOT posts requirements in real time on the pass approaches.
How Washington handles chains
$500 flat, including all statutory assessments (RCW 47.36.250). From about November 1 to April 1, vehicles over 10,000 lbs must carry enough chains plus two extra, and mount them when WSDOT posts the requirement. Approved traction tires do not substitute for a heavy truck. Chains must be metal or cable, not plastic. Watch I-90 Snoqualmie, US-2 Stevens Pass, and SR-410 Chinook Pass. WSDOT posts requirements in real time on the pass approaches.
When, where, and what counts
- When required: Roughly November 1 to April 1, and any time signs are posted. A chain-up is live only when WSDOT posts the requirement on the pass approach (RCW 47.36.250).
- Where: Mountain passes when posted: I-90 Snoqualmie, I-82, SR-97, US-2 Stevens Pass, SR-410 Chinook Pass, US-12 White Pass, and other posted routes.
- Applies to: Vehicles over 10,000 lbs GVWR must carry sufficient chains plus at least two extra during the season, and must mount them when signs require.
- Chains vs traction devices: Chains must be metal or cable, not plastic. When required for a heavy vehicle, approved traction tires do not substitute; chains must be mounted. Approved cable and automatic chain systems that meet WSDOT standards count. Textile covers like AutoSock do not.
- Check the live order: WSDOT mountain pass reports (wsdot.com/travel/real-time/mountainpasses) or call 511 for the requirement in effect right now.
- Fine: $500 flat, including all statutory assessments (RCW 47.36.250).
Washington Chain Law FAQ
Does Washington have a tire chain law?
When are chains required in Washington?
Where do Washington's chain requirements apply?
Does Washington accept AutoSock or alternative traction devices?
Reference information for planning, not legal advice. Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it. Last reviewed July 2026. Source: https://wsdot.wa.gov/travel/commercial-vehicles/route-commercial-vehicle-restrictions/chain-requirements-vehicles-over-10000-pounds. See our Terms & Disclaimer.
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