I-90 & SR 520 construction

Last update: 5 p.m. Friday, Sept. 20

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

I-90

Sound Transit's East Link Extension - E130

Highway: I-90    Region: Northwest    County: King    Location: Milepost(s) 2.54 - 8.84
Contact: Zack Ambrose, Sound Transit, 206-903-7176
Description: Sound Transit crews are constructing the East Link light rail extension from Seattle to Redmond.
Project webpage
Work schedule:

  • Friday, September 27 – The eastbound I-90 HOV off-ramp to Island Crest Way will close from 9 a.m. to 3 p.m.
  • Saturday, Sept. 21 - The eastbound I-90 HOV off-ramp to Island Crest Way will close from 7 a.m. to 3 p.m.
  • Monday, Sept. 23 - The westbound I-90 HOV off-ramp to 80th will close from 10 a.m. to 2 p.m.
  • Tuesday, Sept. 24, to Thursday, Sept. 26 - The HOV lane of westbound I-90 at North Mercer Way will close from 10 a.m. to 2 p.m. daily.

Sound Transit's East Link Extension - E320

Highway: I-90    Region: Northwest    County: King    Location: Milepost(s) 9.14
Contact: Jason Hampton, Sound Transit, 206-903-7177
Description: Sound Transit crews are constructing the East Link light rail extension from Seattle to Redmond.
Project webpage
Work schedule

  • Sunday, September 15, to the morning of Tuesday, September 17 – The HOV lane of westbound I-90 between Richards Road and Bellevue Way Southeast will close from 9 p.m. to 5 a.m. nightly.
  • Sunday, September 15, to the morning of Tuesday, September 17 – The Richards Road on-ramp to westbound I-90 will close from 9 p.m. to 5 a.m. nightly.
  • Sunday, September 15, to the morning of Tuesday, September 17 – The left lane of westbound I-90 between Richards Road and Bellevue Way Southeast will close from 11 p.m. to 5 a.m. nightly.
  • Sunday, September 15, to the morning of Tuesday, September 17 – The right lane of westbound I-90 between Richards Road and Bellevue Way Southeast will close from 11 p.m. to 5 a.m. nightly.
  • Sunday, September 15, to the morning of Tuesday, September 17 – The northbound I-405 ramp to westbound I-90 will close from 10 p.m. to 5 a.m. nightly.
  • Sunday, September 15, to the morning of Tuesday, September 17 – The southbound I-405 ramp to westbound I-90 will close from 10 p.m. to 5 a.m. nightly.
  • Sunday, September 15, to the morning of Tuesday, September 17 – The southbound I-405 ramp to the westbound I-90 HOV lane will close from 8 p.m. to 5 a.m. nightly.
  • Monday, September 16, to the evening of Friday, September 20 – Flaggers will alternate traffic on Southeast 30th Street from 6 a.m. to 5 p.m. daily.

Eastgate to SR 900 Corridor Improvements - #9429

Highway: I-90    Region: Northwest    County: King    Location: Milepost(s) 11.55 - 15.52
ContactJames Harper, Project Engineer, 206-768-5862
Description: WSDOT contractor crews are adding capacity on both directions of I-90 between the Eastgate and West Lake Sammamish Parkway interchanges, by restriping the existing roadway and creating auxiliary lanes. Crews are also constructing noise walls in strategic locations within the project area to minimize the effects of traffic noise.
Project webpage
Work schedule:

  • Monday, September 16, to the evening of Thursday, September 19 – The left lane of westbound I-90 between 150th Avenue Southeast and 17th Avenue Northwest will close from 10 a.m. to 10 p.m.
  • Monday, September 16, to the afternoon of Friday, September 20 – The left lane of eastbound I-90 between 17th Avenue Northwest and 150th Avenue Southeast will close from 5 a.m. to 2 p.m.
  • Wednesday, September 18, to the morning of Friday, September 20 – The left lane of westbound I-90 between 150th Avenue Southeast and 17th Avenue Northwest will close from 6 p.m. to 5:30 a.m. nightly.
  • Wednesday, September 18, to the morning of Friday, September 20 – The two left lanes of westbound I-90 between 150th Avenue Southeast and 17th Avenue Northwest will close from 9 p.m. to 5:15 a.m. nightly.
  • Monday, Sept. 23, to the evening of Friday, Sept. 27 - The left lane of westbound I-90 between 150th Avenue Southeast and 17th Avenue Northwest will close from 10 a.m. to 10 p.m.
  • Monday, Sept. 23, to Friday, Sept. 27 - The left lane of eastbound I-90 between 150th Avenue Southeast and 17th Avenue Northwest will close from 5 a.m. to 2 p.m.
  • Tuesday, Sept. 24, to the morning of Thursday, Sept. 26 - The left lane of westbound I-90 between 150th Avenue Southeast and 17th Avenue Northwest will close from 6 p.m. to 5:30 a.m. A second left lane will be closed from 9 p.m. to 5:15 a.m.

SR 520

West Approach Bridge North - #8625

Highway: SR 520    Region: Northwest    County: King    Location: Milepost(s) 0.88 - 3.04
Contact: SR 520 Bridge Replacement & HOV Program, 206-770-3554
Description: The West Approach Bridge North Project is the latest phase of construction of the SR 520 Bridge Replacement and HOV Program and will extend SR 520's three westbound lanes from the new floating bridge to the Montlake area in Seattle.
Work schedule:

  • No lane or ramp closures are scheduled.

Montlake to Lake Washington I/C and Bridge Replacement - #9015

Highway: SR 520    Region: Northwest    County: King    Location: Milepost(s) 0.94 – 1.56
Contact: SR 520 Bridge Replacement & HOV Program, 206-770-3554
Description: WSDOT crews are performing drill work to obtain soil samples.
Work schedule:

  • Friday, September 13, to the morning of Monday, September 16 – The westbound SR 520 off-ramp to Montlake Boulevard will close from 11 p.m. Friday to 5 a.m. Monday. The off-ramp will be open during a UW football game at Husky Stadium on Saturday from 1:30 p.m. until 2 hours after the game.
  • Friday, September 13, to the morning of Monday, September 16 – The westbound SR 520 off-ramp to East Lake Washington Boulevard will close from 11 p.m. Friday to 5 a.m. Monday. The off-ramp will be open during a UW football game at Husky Stadium on Saturday from 1:30 p.m. until 2 hours after the game.
  • Monday, September 16, to the morning of Thursday, September 19 – The right lane of eastbound SR 520 between Montlake Boulevard and Lake Washington Boulevard will close from 9 p.m. to 5 a.m. nightly.
  • Friday, September 20, to the morning of Monday, September 23 – The Lake Washington Boulevard on-ramp to eastbound SR 520 will close from 11 p.m. Friday to 5 a.m. Monday.
  • Friday, September 20, to the morning of Monday, September 23 – The westbound SR 520 off-ramp to Montlake Boulevard will close from 11 p.m. Friday to 5 a.m. Monday.
  • Friday, September 20, to the morning of Monday, September 23 – The westbound SR 520 off-ramp to Lake Washington Boulevard will close from 11 p.m. Friday to 5 a.m. Monday.

Sound Transit's East Link Extension - E360

Highway: SR 520    Region: Northwest    County: King    Location: Milepost(s) 7.00 - 9.50
Contact: Ryan Bianchi, Sound Transit, 206-398-5070
Description: Sound Transit crews are constructing the East Link light rail extension from Bellevue to Redmond.
Project webpage
Work schedule:

  • Monday, Sept. 23, to the morning of Wednesday, Sept. 25 - A single lane of eastbound SR 520 at 148th Avenue will close from 8 p.m. to 6 a.m. nightly. 

RTS Microsoft Pedestrian Bridge

Highway: SR 520    Region: Northwest    County: King    Location: Milepost(s) 10.14
Contact: Jay Cooper, WSDOT Regional Transit Coordination, 206-716-1102
Description: Microsoft contractor crews are constructing a pedestrian bridge to the Microsoft campus.
Project webpage.
Work schedule:

  • Monday, September 16, to the morning of Friday, September 20 – The left lanes in both directions of SR 520 between 148th Avenue Northeast and Northeast 40th Street will close from 10 p.m. to 5 a.m. nightly.
  • Monday, Sept. 23, to the morning of Friday, Sept. 27 – The left lanes in both directions of SR 520 between 148th Avenue Northeast and Northeast 40th Street will close from 10 p.m. to 5 a.m. nightly.
  • Monday, Sept. 23, to the morning of Friday, Sept. 27 – The eastbound SR 520 off-ramp to 40th Street will close from 10 p.m. to 5 a.m. nightly. 

City of Redmond - NE 51st Street Improvement Project

Highway: SR 520    Region: Northwest    County: King    Location: Milepost(s) 10.72
Contact: Eric Dawson, City of Redmond Project Engineer, 425-556-2867
Description: City of Redmond contractor crews are improving signal efficiency and installing bike lanes.
Project webpage
Work schedule:

  • Friday, September 20, to the morning of Monday, September 23 – The Northeast 51st Street on-ramp to westbound SR 520 will close from 8 p.m. Friday to 5 a.m. Monday.