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Washington State Department of Transportation
Northwest Region – 15700 Dayton Avenue – Shoreline, WA 98133 – 206-440-4000
TRAVEL ADVISORY
May 13, 2025
Contact: Elizabeth Mount, communications, 206-482-2276
Westbound I-90 overnight closure scheduled Friday, May 16, from Mercer Island to Seattle
SEATTLE – All westbound Interstate 90 lanes from Island Crest Way in Mercer Island to Rainier Avenue South in Seattle will close from 10 p.m. Friday, May 16, to 6 a.m. Saturday, May 17, for tunnel maintenance. People should seek alternate routes.
During the closure:
- Westbound I-90 lanes will begin to close at 8:30 p.m. Friday, May 16.
- The 76th Avenue Southeast, Island Crest Way HOV and West Mercer Way on-ramps to westbound I-90 in Mercer Island will close at 9 p.m. Friday, May 16.
- All ramps and lanes will reopen by 6 a.m. Saturday, May 17.
Washington State Department of Transportation tunnel maintenance crews will perform maintenance in the Mount Baker and Mercer Island Lid tunnels during the nighttime closure.
The work includes fire suppression testing, emergency system and lighting maintenance, drain cleaning and road sweeping.
A flammable cargo restriction is in place for both directions of I-90 for the Mount Baker and Mercer Island Lid tunnels. State Route 520 is also under a flammable cargo restriction. Flammable cargo must detour around Lake Washington via I-5 and I-405.
Real-time traffic information is available on the WSDOT mobile app and the real-time travel map.
Hyperlinks within the release:
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WSDOT keeps people, businesses and the economy moving by operating and improving the state's transportation systems. To learn more about what we're doing, go to wsdot.wa.gov/about/news for pictures, videos, news and blogs. Real time traffic information is available at wsdot.com/traffic.
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