My Husband and I are headed to Seattle this weekend and you just never know how the pass will be. I was wondering if everyone is required to carry chains in their vehicle? Here's what I found out...


I'm sure everyone is rushing to Les Schwab to have studded tires put on thinking if I have studs I won't need chains...WRONG according to the WSP website

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.

Here's the exception...

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.

And what is considered an approved "Traction Devices" ?

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 or with the mountain/snowflake symbol on the sidewall) qualify so long as they meet the standards set in WAC 204-24-040 Traction Devices.

Hope this helps again click the link above if you need more information!