WSP Checks Truckers for Chains on Snoqualmie Pass

Washington State Patrol troopers conducted a two-day chain enforcement emphasis on Snoqualmie Pass November 3 and 4, the agency said in a release. The emphasis targeted commercial motor vehicle drivers to check whether they carry the required amount of snow traction devices during winter months.

Trooper Jeremy Weber, the release's author, said the main goal is to educate drivers and gain compliance with the chain requirement, which runs from November 1 through April 1 on the pass. WSP said it would post results of the emphasis on social media once complete.

The release does not specify citation numbers, fine amounts, or how many vehicles were checked during the two-day period. It also does not detail the exact chain quantity required or cite the underlying state statute or regulation establishing the Snoqualmie Pass chain rule.

For carriers and owner-operators running I-90 over Snoqualmie Pass this winter, the takeaway is straightforward: WSP is actively watching for compliance with the seasonal chain requirement, and drivers caught without the required traction devices risk enforcement action.

All sources

• WSP Conducts Chain Enforcement Emphasis on Snoqualmie Pass — Government site: Washington State Patrol, Commercial Vehicle Division, 2026-11-03