The two left lanes were blocked on northbound I-5 at South 188th Street in SeaTac after a collision Wednesday morning, April 17, 2024.

As of 7 a.m. Wednesday morning, the backup was about eight miles and growing.

There is no estimated time for reopening.

Drivers traveling in the area should use alternate routes and expect delays.

People can receive real-time travel information via the WSDOT mobile app or the real-time travel map.