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Update: Washington State Department of Transportation reports that all lanes on southbound and northbound I-5 near Castle Rock are open once again.

“This was a 22 vehicle collision, involving multiple commercial vehicles & passenger cars. 6 people were transported to 3 area hospitals before troopers arrived on scene,” Washington State Trooper Will Finn reported on .

Despite opening all lanes, there still was a reported 10-12 mile traffic delay. That is expected to slowly clear Thursday evening.

Original Article:

All lanes of Interstate 5 (I-5) north are back open, while only the right lane on I-5 south is open near Castle Rock and Toledo, as reported by The Washington State Department of Transportation (WSDOT) on X Thursday.

UPDATE: SB I-5 at MP 60 has the right lane OPEN.

Thank you for your patience as we work to clear this collision. Our crews are doing their best in these conditions, and our Incident Response Team (IRT) is helping drivers in the backups, including those needing fuel.

— WSDOT Southwest (@wsdot_southwest)

A disabled semi-truck was blocking all lanes of I-5 north at milepost 56, just south of Jackson Highway. A collision was blocking all lanes of I-5 south at milepost 60 near Exit 59 by the Cowlitz River.

WSDOT stated to expect delays.

UPDATE: The disabled semi blocking all lanes of NB I-5 at MP 56 is cleared. All lanes are open.

— WSDOT Southwest (@wsdot_southwest)

WSDOT sent out a separate X post, saying to delay travel if possible.

“If you do need to head out, expect significant delays,” the agency stated. “Be prepared w/ a full gas tank, water, food, warm clothes, and anything else you’ll need for sitting in backups.”

I-5 in Clark County is backed up w/ multiple collisions & disabled vehicles.

If possible, delay travel. If you do need to head out, expect significant delays. Be prepared w/ a full gas tank, water, food, warm clothes, and anything else you’ll need for sitting in backups.

— WSDOT Southwest (@wsdot_southwest)

This is a developing story, check back for updates.