Driver suspected of impairment arrested after I-5 crash in Seattle

SEATTLE - A driver suspected of impairment was arrested after a three-car crash on northbound I-5 in Seattle overnight.

What we know:

The crash happened near State Route 520 after midnight on Thursday. 

According to Washington State Patrol Trooper Rick Johnson, the causing driver was suspected of impairment and arrested for vehicular assault. 

(Washington State Patrol Trooper Rick Johnson)

One driver was taken to the hospital with a broken arm. 

The crash left one lane blocked for the investigation and caused backups on northbound I-5, but at about 2 a.m., all lanes reopened. 

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