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Vehicle & Driver · Traction Devices
From passenger cars and pickups or large commercial trucks or buses,
we answer the most common questions about traction devices here.
Read Washington's standards (Chapter
204-24 WAC) for tire chains, studded tires, and their use and
approval.
Questions and Answers
- What qualifies as a traction tire? Do mud
and snow tires?
Tires labeled as all-season, all-weather, snow tire or studded
(must be labeled M&S on the sidewall) qualify
so long as they meet the standards set in WAC
204-24-040 Traction Devices.
- When can I use studded tires?
Studded tires are approved for use from November 1 to March 31.
The Washington State Department of Transportation (WSDOT) determines
additional periods in which they can be used. Studded tires are
not allowed on vehicles over 10,000 pounds. For more information
see WSDOT's studded
tire page.
- I drive a vehicle with studded tires. When DOT requires chains
to be put on, do I need them with studded tires?
Yes. Studded tires are not a substitute for chains.
- I have an all-wheel or four-wheel drive vehicle.
When "Chains
Required" signs are posted, do I have to use chains?
No. All-wheel drive vehicles are exempt from chain requirements
when all wheels are in gear and are equipped with approved traction
devices, provided that tire chains for at least one set of drive
tires are carried in the vehicle. See WAC
204-24-050.
- I can't use regular cable chains because there's not enough clearance
in the wheel well. What other approved traction devices can I use?
it is recommended you consult the vehicle owner's manual
to see what the manufacturer suggests. You can use a device which
locks to each drive wheel of a vehicle with traction arms that
are held in an operational position by a hub assembly or an advanced
traction device made from high-performance flexible polyurethane
intended for use on passenger-type vehicles. They are approved
for use when "Chains Required" signs
are posted.
- Where can I find information on the chain
requirements for vehicles and combinations over 10,000 pounds
GVW?
The State Patrol's Commercial Vehicle Division (CVD)
has a Chaining Requirements brochure
that illustrates chaining 2-4, 5, and 6 or more axles. It is available
at all Washington State Patrol offices and weigh stations. For
additional information, see the Commercial
Vehicle Division.
You may also call the Washington State Patrol Equipment and Standards
Section in Olympia at (360) 596-4017 or send your inquiries via e-mail
to equipment@wsp.wa.gov.
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