Collision backs up traffic for 9 miles on northbound I-5 near Mill Creek

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backupSEATTLE — Traffic heading north on Interstate 5 was backed up for 9 miles during the evening commute after a collision that blocked three lanes at 164th Street SW near Mill Creek, the Washington State Department of Transportation said.

“Expect delays to last through PM commute,” WDOT tweeted. “FIND ALTERNATE ROUTES!”