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Construction on I-90 & SR 520

Last update: 11:07 a.m. Monday, Oct. 27 2014

This information changes frequently. Please check back often. Travelers can also call 5-1-1 for real-time traffic and weather updates.

See closures for SR 520.

Last update: 2:43 p.m., 10/22
I-90 express lanes
Get the regular express lanes schedule.


Last update: 1:45 p.m., 10/23
I-90: Two-Way Transit and HOV Operations - Stage 3A #8569
Mileposts: 9.14
Hien Trinh, Project Engineer, 206-768-5601
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  • Now work is scheduled that will affect traffic.

SR 520

Last update: 10:24 a.m., 10/24
SR 520: West Approach Bridge North project #8625
Mileposts: 0.88 -  3.04
Steve Strand, Project Engineer, 206-770-3565
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  • Saturday, Oct. 25 to the morning of Sunday, Oct. 26 - A single lane of westbound SR 520 from the mid-span to Lake Washington Boulevard will close from 9 p.m. to 10 a.m. for work trestle deliveries.
  • Sunday, Oct. 26 to the morning of Friday, Oct. 31 - A single lane of westbound SR 520 from the mid-span to Lake Washington Boulevard will close nightly from 9 p.m. to 6 a.m. for work trestle deliveries.
  • Saturday, Nov. 1 to the morning Sunday, Nov. 2 - A single lane of westbound SR 520 from the mid-span to Lake Washington Boulevard will close from 9 p.m. to 10 a.m. for work trestle deliveries.
  • Sunday, Nov. 2 to the morning of Friday, Nov. 7 - A single lane of westbound SR 520 from the mid-span to Lake Washington Boulevard will close nightly from 9 p.m. to 6 a.m. for work trestle deliveries.


Last update: 11:45 a.m., 10/22
520: Medina to SR 202 Eastside Transit and HOV project #7963
Milepost: 3.98 – 6.43
Mark Allison , Project Engineer, 425-998-5255
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  • Check back often for updates on this project.

Last update: 11:34 a.m., 10/22
SR 520: 108th Ave NE to W Lake Sammamish Pkwy paving #8597
Milepost: 6.22 – 11.69
Mark Sawyer, Project Engineer, 425-225-8799
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There may be closures on I-405 for this project  

  • No work that will affect traffic is scheduled this week.