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Weekly update of construction closures in Downtown Seattle and SODO

Last update: 4:25 p.m., Thursday, Sept. 21

This webpage contains information about WSDOT construction projects affecting vehicle or pedestrian traffic through downtown Seattle and SODO. If a highway is not listed below, there are no scheduled lane closures at this time, although emergency lane closures may still occur.

This information changes frequently so please check back often. Travelers can also call 5-1-1 or monitor @WSDOT_Traffic on Twitter for real-time traffic and weather updates.

City street closure information: Check with the Seattle Department of Transportation or monitor @SeattleDOT on Twitter.

| I-5 | I-90 | SR 99 | SR 513 | SR 520 | Traffic Impacts Calendar |

Express Lanes Schedule Changes

Highway: I-5    Region: Northwest    County: King    Location: Milepost(s) 165.29 - 172.43
Contact: Nicole Daniels, Communications, 206-440-4479
Description: WSDOT uses the I-5 express lanes to assist the flow of traffic during busy travel times. These lanes are scheduled to move in the direction that will relieve the most congestion from the transportation system.
Express lanes schedule
Work schedule:

  • No lane or ramp closures are scheduled.
NB MLK Jr Way to NE Ravenna Br Pavement Repair - #8952

Highway: I-5    Region: Northwest    County: King    Location: Milepost(s) 157.44 - 170.28
Contact: Dave Lindberg, Project Engineer, 425-225-8725
Description: WSDOT contractor crews are replacing 37 expansion joints and large sections of concrete pavement on northbound I-5 between MLK Junior Way South/SR 900 in Tukwila and Northeast Ravenna Boulevard in Seattle.
Project website
Work schedule:

  • Monday, Sept. 18, to the morning of Friday, Sept. 22 - The right lane of northbound I-5 between Northeast 50th Street and Ravenna Boulevard will be closed from 9 p.m. to 5 a.m. nightly. This work is weather dependent.
  • Monday, Sept. 18, to the morning of Friday, Sept. 22 - The Northeast 50th Street on-ramp to northbound I-5 will be closed from 9 p.m. to 5 a.m. nightly. This work is weather dependent.
  • Monday, Sept. 18, to the morning of Friday, Sept. 22 - The northbound I-5 off-ramp to Ravenna Boulevard will be closed from 9 p.m. to 5 a.m. nightly. This work is weather dependent.
  • Wednesday, Sept. 20, to the morning of Friday, Sept. 22 - The northbound I-5 off-ramp to Swift Avenue will be closed from 9 p.m. to 4 a.m. nightly. This work is weather dependent.
  • Wednesday, Sept. 20, to the morning of Friday, Sept. 22 - The northbound I-5 off-ramp to Mercer Street will be closed from 10 p.m. to 5 a.m. nightly. This work is weather dependent.
  • Saturday, Sept. 23, to the morning of Sunday, Sept. 24 - The northbound I-5 off-ramp to Swift Avenue will be closed from 9 p.m. to 4 a.m. This work is weather dependent.
  • Saturday, Sept. 23, to the morning of Sunday, Sept. 24 - The northbound I-5 off-ramp to Mercer Street will be closed from 10 p.m. to 5 a.m. This work is weather dependent.
Ship Canal Bridge Maintenance Work

Highway: I-5    Region: Northwest    County: King    Location: Milepost(s) 167.50 - 169.00
Contact: Nicole Daniels, Communications, 206-440-4479
Description: WSDOT maintenance crews are performing bridge deck repair work on the I-5 Ship Canal Bridge in Seattle.
Work schedule:

  • **HIGH IMPACT** Saturday, Sept. 30 - The two left lanes of southbound I-5 between Northeast 50th Street and Boylston Avenue will be closed from 2 to 10 a.m.
  • **HIGH IMPACT** Sunday, Oct. 1 - The two right lanes of southbound I-5 between Northeast 50th Street and Boylston Avenue will be closed from 2 to 10 a.m.
  • **HIGH IMPACT** Sunday, Oct. 1 - The Northeast 45th Street on-ramp to southbound I-5 will be closed from 2 to 10 a.m.
Seattle Maintenance Work

Highway: I-5    Region: Northwest    County: King    Location: Milepost(s) 168.00
Contact: Nicole Daniels, Communications, 206-440-4479
Description: WSDOT maintenance crews are replacing an impact attenuator and performing pavement repair work on the I-5/SR 520 ramps in Seattle.
Work schedule:

  • Thursday, Sept. 21, to the morning of Friday, Sept. 22 - The left lane of southbound I-5 on the Ship Canal Bridge will be closed from 10 p.m. to 5 a.m.
  • **HIGH IMPACT** Thursday, Sept. 21, to the morning of Friday, Sept. 22 - The southbound I-5 off-ramp to eastbound SR 520 will be closed from 11 p.m. to 5 a.m.
  • **HIGH IMPACT** Monday, Sept. 25, to the morning of Wednesday, Sept. 27 - The westbound SR 520 off-ramp to southbound I-5 will be closed from 11 p.m. to 5 a.m. nightly. This work is weather dependent.
  • **HIGH IMPACT** Wednesday, Sept. 27, to the morning of Thursday, Sept. 28 - The westbound SR 520 off-ramp to southbound I-5 will be closed from 10 p.m. to 5 a.m. nightly. This work is weather dependent.
  • Wednesday, Sept. 27, to the morning of Thursday, Sept. 28 - The left lane of southbound I-5 between SR 520 and Boylston Avenue will be closed from 11 p.m. to 5 a.m.
  • **HIGH IMPACT** Thursday, Sept. 28, to the morning of Friday, Sept. 29 - The westbound SR 520 off-ramp to southbound I-5 will be closed from 11 p.m. to 5 a.m. This work is weather dependent.
Two-Way Transit and HOV Operations (Stage 3) - #8662

Highway: I-90    Region: Northwest    County: King    Location: Milepost(s) 2.48 9.28
Contact: Aleta Borschowa, Project Engineer, 206-768-5601
Description: WSDOT and Sound Transit contractor crews are adding HOV lanes to both directions of I-90 between Seattle and Bellevue and preparing the center roadway for East Link light rail.
Project webpage
Work schedule:

  • Until Further Notice – Flammable cargo is prohibited from traveling in both directions of I-90 inside the Mount Baker and Mercer Island Lid tunnels until further notice.
Alaskan Way Viaduct Replacement Project

Highway: SR 99    RegionNorthwest    County: King    Location: Milepost(s) 30.36 - 32.86
Contact: Laura Newborn, Communications, 206-805-2871
Description: WSDOT contractor crews are building a new SR 99 tunnel through downtown Seattle.
Project webpage
Work schedule:

  • No lane or ramp closures are scheduled.

West Approach Bridge North - #8625

Highway: SR 513    Region: Northwest    County: King    Location: Milepost(s) 0.00
Contact: Steve Strand, Project Engineer, 206-770-3565
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.
Project website
Work schedule:

  • No lane or ramp closures are scheduled.
Seattle Maintenance Work

Highway: SR 520    Region: Northwest    County: King    Location: Milepost(s) 0.00
Contact: Nicole Daniels, Communications, 206-440-4479
Description: WSDOT maintenance crews are replacing an impact attenuator and performing pavement repair work on the I-5/SR 520 ramps in Seattle.
Work schedule:

  • **HIGH IMPACT** Thursday, Sept. 21, to the morning of Friday, Sept. 22 - The southbound I-5 off-ramp to eastbound SR 520 will be closed from 11 p.m. to 5 a.m.
  • **HIGH IMPACT** Monday, Sept. 25, to the morning of Wednesday, Sept. 27 - The westbound SR 520 off-ramp to southbound I-5 will be closed from 11 p.m. to 5 a.m. nightly. This work is weather dependent.
  • **HIGH IMPACT** Wednesday, Sept. 27, to the morning of Thursday, Sept. 28 - The westbound SR 520 off-ramp to southbound I-5 will be closed from 10 p.m. to 5 a.m. nightly. This work is weather dependent.
  • **HIGH IMPACT** Thursday, Sept. 28, to the morning of Friday, Sept. 29 - The westbound SR 520 off-ramp to southbound I-5 will be closed from 11 p.m. to 5 a.m. This work is weather dependent.


West Approach Bridge North - #8625

Highway: SR 520    Region: Northwest    County: King    Location: Milepost(s) 0.88 – 3.04
Contact: Steve Strand, Project Engineer, 206-770-3565
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.
Project webpage
Work schedule: 

  • No lane or ramp closures are scheduled.

Plan ahead by checking for major traffic impacts on all state highways.