One lane of southbound SR 167 has reopened in Renton near Southwest 43rd Street after a crash shut down the highway.
Two left lanes remain blocked.
According to the Washington State Department of Transportation, the crash happened sometime after 2 a.m. Thursday.
Emergency responders are at the crash, working to clear it.
There is no estimated time for when the lanes will reopen.
People should expect delays for the time being and use another route if possible.
Washington State Patrol told KIRO 7 News that only one car was involved in the crash. The passenger has serious injuries and driver was arrested for vehicular assault.
Troopers believe the driver was impaired at the time of the crash.