Thursday (Nov. 1) is the first day that studded tires are legal on vehicles in Washington state. Studded tires must be off by March 31, unless the period is extended by the Washington State Department of Transportation (WSDOT).

WSDOT also advises that studded tires do not satisfy state requirements for also carrying chains. There are no individual exception to the studded tire season, WSDOT says on its website.

The agency also notes that motorists are encouraged to consider stud-free traction tires that are legal for year-round use and do not cause the same roadway damage as studded tires, which can produce ruts that create safety issues such as ponding (standing water on the roadway), hydroplaning and excessive road spray.

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