The studded tire season in Oregon begins Thursday. But both the Oregon and Washington state transportation departments encourage drivers to consider other types of traction tires or chains. ODOT’s latest study in 2014 concluded studded tires annually cause about $8.5 million in damage to state highways. Other types of traction tires are available, with those that meet Rubber Manufacturers Association standards for use in severe snow conditions carrying a special symbol on the tire sidewall showing a three-peaked mountain and snowflake. ODOT claims they work about as well as studded tires on ice, and better than studded or regular tiers in most other winter conditions.