Update:

A multiple-vehicle collision involving a semi was blocking westbound I-90 at the midspan has been been cleared and all lanes are now open.

A multiple-vehicle collision involving a semi is blocking the two left lanes of westbound I-90 at the midspan between Bellevue and Seattle. Traffic is getting by in the right lane.

WSP and WSDOT are on scene.

Traffic is backed up six miles to 148th Avenue Southeast in Bellevue. Drivers are advised to expect delays and take alternate routes to avoid the area.