The crash, south of South 188th Street in SeaTac, blocked four right lanes on northbound I-5, according to the State Patrol.
A collision on Interstate 5 near Southcenter blocked several lanes and caused a backup stretching at least 7 miles approaching Seattle Wednesday morning, authorities said.
The crash, just south of South 188th Street in SeaTac, involved several vehicles and blocked four right lanes on northbound I-5, according to the Washington State Patrol.
The crash was cleared about 7 a.m., but significant delays remained during rush hour.
Authorities are advising drivers to take alternate routes.