SEATAC, Wash. — UPDATE 5:35 a.m. Monday: All lanes are back open on NB I-5 at S 188th St after an earlier collision, per WSDOT.
EARLIER:
All lanes of northbound I-5 near the Seattle-Tacoma International Airport were blocked early Monday after a multi-vehicle collision, according to the Washington State Department of Transportation.
The crash happened sometime around 12:40 a.m. just north of South 188th Street (exit 152)
All northbound vehicles were diverted to South 188th Street and Orillia Road.
As of 4 a.m., backups were building as the Monday morning commute traffic began to trickle in. By 4:45 a.m., the backup was about 2 miles long, stretching back to SR 509. By 5:15 a.m., backups stretched back to near SR 516 - almost 3 miles.
WSDOT says crews still do not have a timeline for when lanes will reopen.
Drivers are asked to allow extra travel time, expect delays, and use alternate routes if possible.
This is a developing story and will be updated as more information becomes available. KIRO 7 has a crew heading to the scene.
©2026 Cox Media Group
