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Construction on I-90 & SR 520

Last update: 12:07 p.m. Tuesday, Sept. 30, 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: 11:13 a.m., 9/12
I-90 express lanes
Get the regular express lanes schedule.

  • Sunday, Sept. 28 - The I-90 express lanes will have an added westbound service until 2 p.m. Sunday to accommodate extra traffic heading into Seattle. Lanes will be eastbound by 3:30 p.m.
  • Sunday, Oct. 12 - The I-90 express lanes will have an added westbound service until 2 p.m. Sunday to accommodate extra traffic heading into Seattle. Lanes will be eastbound by 3:00 p.m.
  • Monday, Oct. 13 - The eastbound I-90 express lanes will be closed from 10 a.m. to 2 p.m. for maintenance work. Lanes will reopen eastbound by 2 p.m.
  • Saturday, Oct. 25 -The I-90 express lanes will have an added westbound service until 2 p.m. Sunday to accommodate extra traffic heading into Seattle. Lanes will be eastbound by 3:00 p.m.  

Last update: 10:42 a.m., 9/26
I-90: Tunnel fire suppression testing
Mileposts: 3.57 - 6.56
Scott Vanantwerp, WSDOT tunnels, 206-440-5206

  • Friday, Oct. 3 to the morning of Saturday, Oct. 4 - Eastbound I-90 traffic will be shifted to the I-90 express lanes from 11:59 p.m. Friday to 6 a.m. Saturday for tunnel fire suppression testing. Flammable cargo will be prohibited eastbound during this time.
  • Monday, Oct. 6 to the morning of Thursday, Oct. 9 - Flammable cargo will be prohibited in the eastbound and westbound I-90 tunnels from 6 a.m. Monday to 4 p.m. Thursday. Maintenance crews will perform annual tunnel fire suppression testing during this time.

Last update: 12:26 p.m., 8/26
I-90: Bridge Inspection
Mileposts: 8.48-8.9
Jim Malloy, WSDOT maintenance, 425-339-1778

  • Tuesday, Sept. 30 - The HOV lane of westbound I-90 at the East Channel Bridge will close from 9 a.m. to 1 p.m. for bridge inspection. 
  • Wednesday, Oct. 1 - The left lane of eastbound I-90 at the East Channel Bridge will close from 9 a.m. to 1 p.m. for bridge inspection.

Last update: 8:57 a.m., 9/3
I-90: Two-Way Transit and HOV Operations - Stage 3A #8569
Mileposts: 9.14
Hien Trinh, Project Engineer, 206-768-5601
Get Project information

  • No work that will affect traffic is scheduled.

SR 520

Last update: 10:53 a.m., 9/22
SR 520: West Approach Bridge North project #8625
Mileposts: MP 0.88 - MP 3.04
Steve Strand, Project Engineer, 206-770-3565
Get Project information

  • No work that will affect traffic is scheduled.


Last update: 12:21 p.m., 9/30
520: Medina to SR 202 Eastside Transit and HOV project #7963
Milepost: 3.98 – 6.43
Mark Allison , Project Engineer, 425-998-5255
Get Project information    

  • Monday, Sept. 29 to the morning of Friday, Oct. 3 - One lane of eastbound and westbound SR 520 between 84th Avenue Northeast and I-405 will close nightly from 9 p.m. to 5 a.m. for striping work.
  • DRIVER ALERT: Friday, Oct. 3 to the morning of Monday, Oct. 6 - The eastbound SR 520 off-ramp to Bellevue Way Northeast will close from 10 p.m. Friday to 5 a.m. Monday for drainage work.
  • DRIVER ALERT: Friday, Oct. 3 to the morning of Monday, Oct. 6 - The Bellevue Way Northeast on-ramp to westbound SR 520 will close from 10 p.m. Friday to 5 a.m. Monday for drainage work.
  • Friday, Oct. 3 to the morning of Monday, Oct. 6 - Northbound and Southbound Bellevue Way Northeast at I-405 will close from 10 p.m. Friday to 5 a.m. Monday for drainage work.
  • Monday, Oct. 6 to the morning of Friday, Oct. 10 - One lane of eastbound and westbound SR 520 between 84th Avenue Northeast and I-405 will close nightly from 9 p.m. to 5 a.m. for striping work.

Last update: 12:06 p.m., 9/30
SR 520: 108th Ave NE to W Lake Sammamish Pkwy paving #8597
Milepost: 6.22 – 11.69
Mark Sawyer, Project Engineer, 425-225-8799
Get Project information

There may be closures on I-405 for this project  

  • Tuesday, Sept. 30 to the morning of Wednesday, Oct. 1 – Two left lanes of westbound and eastbound SR 520 between I-405 and 108th Avenue Northeast will close from 9 p.m. to 5 a.m. for permanent striping work. This work is weather dependent.
  • Wednesday, Oct. 1 to the morning of Thursday, Oct. 2 - Two right lanes of eastbound SR 520 between I-405 and 108th Avenue Northeast will close from 9 p.m. to 5 a.m. for permanent striping. This work is weather dependent.
  • DRIVER ALERT: Wednesday, Oct. 1 to the morning of Thursday, Oct. 2 - The southbound I-405 ramp to eastbound SR 520 will close from 9 p.m. to 5 a.m. for permanent striping. This work is weather dependent.
  • DRIVER ALERT: Wednesday, Oct. 1 to the morning of Thursday, Oct. 2 - The northbound I-405 ramp to eastbound SR 520 via 124th Avenue Northeast will close from 9 p.m. to 5 a.m. for permanent striping. This work is weather dependent.
  • Wednesday, Oct. 1 to the morning of Thursday, Oct. 2 - The eastbound SR 520 off-ramp to 124th Avenue Northeast will close from 9 p.m. to 5 a.m. for permanent striping. This work is weather dependent.
  • Wednesday, Oct. 1 to the morning of Thursday, Oct. 2 - Two left lanes of westbound SR 520 between West Lake Sammamish Parkway and Northeast 51st Street will close from 9 p.m. to 5 a.m. for permanent striping. This work is weather dependent.