CHOKEPOINTS

Winter driving season begins: Studded tires are back, chains required over passes

Nov 4, 2025, 5:01 AM | Updated: 3:29 pm

Chains wsp snoqualmie pass...

Glen Eck attempts to put chains on his tire while his car is stuck in a snow drift. (Photo: Jessica Kourkounis, Getty Images)

(Photo: Jessica Kourkounis, Getty Images)

Nov. 1 came and went without much fanfare, but it marks a significant change in your preparations for driving over the passes.

You can put your studded tires back on your car. They are legal to use through March 31. Though the state asks you to look into studded tire alternatives because it estimates those tires cause up to $29 million in damage to Washington’s roads each year.

You should start carrying your chains in your car, just to be ready when the snow hits. If you are traveling over the passes, you are not required to carry chains in passenger vehicles, but you should. You don’t want to get a ticket for not following the chain requirements in bad weather.

When the chains required sign is active, even Four Wheel Drive or All Wheel Drive vehicles are required to put them on. The state requires them on at least the two front or two rear tires.

And studded tires don’t meet the chain requirements. You still need to chain up, if required.

Now to the big boys. The commercial vehicles and any rig over 10,000 pounds GVW, which could be some passenger trucks or SUVs.

Chains required at all times over the passes

You are required to have chains at all times over the passes. Sergeant Rocky Oliphant, spokesperson for the Washington State Patrol Commercial Vehicle Division, said emphasis patrols are coming.

“Officers and troopers will be doing chain enforcement,” he said. “If you do not have chains and you’re in a commercial vehicle, you will be pulled over, possibly ticketed, and for sure, turned around.”

That’s the penalty for failing to carry chains. A trip back down the mountain. That’s a bad day.

Oliphant wanted to drive this message home early in the season so we don’t have trouble when the snow arrives.

“Every year it seems like we have some sort of semi truck commercial vehicle that has an issue, didn’t end up having chains, and we end up having to shut down the pass,” he said. “We would like to get ahead of this, so we usually will do an emphasis out there with chain enforcement to hopefully get people prepared for going over the pass.”

And Oliphant has a message for us non-commercial drivers: Give those big rigs a lot of room. Don’t make sudden moves around them. Don’t be the reason for a truck losing control.

“Give semi trucks extra room,” he said. “A lot of things that we see, and this is something that I’ve tried to focus on a little bit more, is aggressive cars around trucks. Sometimes we have these aggressive cars. They cut off semi trucks. Those trucks don’t have as much space where they can stop.”

They also might not see you.

One more tip. I mentioned this a few weeks ago, but now is the time to practice putting those chains on.

Drive safely.

Chris Sullivan is a traffic reporter for KIRO Newsradio. Read more of his stories here. Follow KIRO Newsradio traffic on X.

Please follow our Community Guidelines

Chokepoints

road with paint seattle convention center...

Chris Sullivan

Seattle Convention Center paints itself into a transportation mess on 9th Ave

A Seattle Convention Center art event left a key I-5 access road covered in paint that can't be removed, and there's no timeline to reopen.

22 hours ago

sb i-5 semi-truck backup...

Jason Sutich

All lanes of SB I-5 reopen near Ship Canal Bridge after semi-truck collision caused 7-mile backup

All lanes have been reopened along southbound I-5 near the Ship Canal Bridge after a collision involving a semi-truck.

2 days ago

bus crash light rail...

Jake Renn, KIRO 7 News

Link light rail train involved in crash with bus, trains delayed

Link light rail trains have been delayed this morning, Sept. 15, because of a crash with an empty school bus.

3 days ago

closures...

Nate Connors

Expect delays: WSDOT has a busy week of closures planned across the region

Most of this week's lane and ramp closures are a continuation of the region's pavement repair projects scheduled to wrap up in the spring of 2027.

3 days ago

illegal parking...

Chris Sullivan

WSDOT found a fix to illegal parking on the SEA Airport expressway. Then it took it away

The rampant illegal parking on the airport expressway is one of the most selfish and most dangerous things I see drivers do in our region.

3 days ago

arlington log truck sr 530...

Jason Sutich

‘Tragic collision’: Log truck and vehicle crash on SR 530 near Arlington, killing woman

SR 530 has reopened after the road was blocked for hours due to a fatal collision in Arlington.

4 days ago

Winter driving season begins: Studded tires are back, chains required over passes