Interstate 90 Bridge Closure Begins Late Friday Night

SEATTLE — Drivers with late-night trips planned over Lake Washington will not be able to use Interstate 90 for a few hours heading into the weekend, with a full closure planned for crews to complete inspections. Both directions of I-90 will be closed from Interstate 5 in Seattle to Island Crest Way on Mercer Island, from 11:59 p.m. Friday until 6 a.m. Saturday.

The overnight closure will allow time for Washington State Department of Transportation crews to upgrade and test systems complete other maintenance, including:

• Routine maintenance work inside the Mount Baker Tunnel and the Mercer Island lid.
• Upgrading and testing the fire suppression systems.
• Addressing signage on the floating bridge.
• Routine preservation work in the tunnels.

Sound Transit crews will use the same closure to get some more work done on the East Link light rail extension, including:

• Fencing and barrier work along the I-5 to eastbound I-90 on-ramp.
• Moving large equipment into place around the Judkins Park Station area.
• Preparing for landscaping work along I-90.

Drivers have the usual options for navigating around the closure:

• Northbound I-5 to SR 520 eastbound bridge to I-405 south
• Southbound I-5 to I-405 north
• Westbound I-90 to I-405 north to SR520 westbound