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I-90 - Two-Way Transit & HOV Operations - Weekend Closures

This web page provides details on upcoming directional closures of I-90 between Seattle and Bellevue. For a list all  project closures, including single-lane closures and other activities, visit the I-90 and SR 520 construction update .

During the weekend closures traffic will be detoured to the express lanes from 11 p.m. on Friday through 5 a.m. on Monday. Drivers should expect delays and give themselves extra time to complete their trip across Lake Washington. Also, consider using alternate routes like I-5, I-405 or SR 520 to reach your destination.

UPDATED: August 1, 2016

When are the next I-90 weekend closures?

Directional closures: all westbound lanes

  • Nov. 4-7

Directional closures: all eastbound lanes

  • Sept. 9-12

Why do crews need to completely close the highway?

Closing the highway for the weekend to complete work activities keeps traffic flowing during peak weekday travel times. Doing the work with only nighttime closures would significantly extend the amount of time needed to complete the project which must be done by mid-2017 so that Sound Transit can begin construction of the East Link light rail extension in the express lanes.

Why don't I see anyone working during the closures?
During the weekend closures WSDOT and Sound Transit contractor crews are mostly working inside the Mount Baker and Mercer Island tunnels and aren't visible to drivers from the highway.

What can drivers do?

Thousands of vehicles travel across the I-90 bridge on a typical weekend. We need drivers' help to prevent regional gridlock during a weekend closure. We suggest drivers:

  • Know Before You Go: check the Seattle traffic website, call 511 for real-time travel information and plan for delays and added travel time.
  • Delay discretionary trips, especially during high traffic periods, between 10 a.m. and 8 p.m.
  • Expect congestion on alternate routes such as I-405, I-5 and SR 520.
  • Key alternate routes for drivers heading to Seattle and the sports stadiums from the south end include SR 509, SR 599, East Marginal Way South, Airport Way South and Fourth Avenue South.
  • During daytime closures, drivers should expect increased congestion on local streets, especially Rainier Avenue South, Fourth Avenue South and South Dearborn Street in Seattle and Bellevue Way Southeast in Bellevue. 
  • Carpool and use transit. Here are some links to help you plan your trip:
    - King County Metro
    - Sound Transit
    - RideshareOnline.com
    - Google trip planner
    - Community Transit