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Road and weather conditions vary significantly throughout our state. Choose the best winter tire for the conditions you will drive in. Since different types of winter tires perform best under different road conditions, your local tire dealer can help you select the best option.
Approved traction tires have at least an eighth of an inch of tread and are labeled "Mud and Snow," "M+S," "MS," "All Season," or have a "Mountain/Snowflake," symbol. These tires can be used year round. Studded tires are approved traction tires but are only legal between November 1st and March 31st.
Tire chains come in many varieties such as cross link, cable chains, and plastic or nylon chains. All are permissible for passenger vehicles when CHAINS REQUIRED signs are posted. Minimum chain requirements for commercial vehicles can be found at Washington State Patrol's Commercial Vehicle Division website: www.wsp.wa.gov/traveler/cvd.htm
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Road signs let drivers know the legal requirements on roadways. To keep Drivers and roadways safe, we sometimes restrict oversize vehicles from roadways during severe weather conditions. Check the latest road restrictions at: www.wsdot.wa.gov/commercialvehicle/ |
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Chains required on vehicles over 10,000 gross vehicle weight rating (GVWR). If your vehicle exceeds that gross weight, chains are required. If you fail to install chains you may get ticketed and fined. Trucks must carry chains Nov. 1 through Mar. 31 on certain state roads. |
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Chains required on all vehicles - Except all-wheel drive In extreme weather conditions, the Washington State Patrol will require all vehicles (except all-wheel drive) to install tire chains. However, the Washington State Patrol can require chains on all-wheel drive vehicles too. Check out: www.wsp.wa.gov/traveler/cvd.htm |
Heavy snowfall in the mountains followed by rain or warm weather increases avalanche hazards.
WSDOT avalanche control technicians use explosives to set off controlled avalanches to help keep drivers safe. Controlled avalanches direct when and where the snow comes down the mountain. When possible, avalanche control is done when traffic is light and traffic is stopped for safety. Snoqualmie (I-90) and Stevens (US 2) passes are two areas that require avalanche control work.
Our maintenance crews are ready 24 hours a day, seven days a week to prevent or remove snow and ice from highways. This task takes precedence over all other non-emergency work.
We take a two-step approach to keeping roads safe during winter weather. We prevent ice from forming on highways in the most vulnerable locations by applying anti-icing compounds. If snow or ice appears on highways, we plow and apply sand and deicer. We remove snow from the most heavily traveled interstates and state routes first. After these high priority highways are cleared, we remove snow and ice on other highways. Initial efforts are directed to locations where drivers are most vulnerable: hills, curves, ramps, bridges and interchanges. Although plowing starts soon after the storm begins, it takes time to complete the work, particularly if the storm continues to produce snow and ice.
Some mountain passes; including the North Cascades, Chinook and Cayuse passes; are closed each winter. These road closures occur where deep snow and avalanches make it unsafe for motorists and maintenance crews. Our snow removal operations provide motorists with a reasonably safe traveling surface. Despite these efforts, we cannot guarantee ice-free roadways. Motorists must always exercise caution when driving in cold and wet weather. For additional information about WSDOT’s snow and ice removal program, go to: www.wsdot.wa.gov/maintenance/anti-ice.htm
Keeping your vehicle clean during the winter keeps snow and road grime from caking on your head and taillights, which makes it easier for you to see and be seen. Anti-icing chemicals can cause corrosion so wash your vehicle as necessary. All the chemicals are water-soluble, so rinse your vehicle thoroughly before applying soap. If towing aluminum boats or trailers, be sure to wash them, too.
If you have questions, please contact regarding WSDOT Winter Driving Tom Root (360) 705-7857.
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