Downtown Seattle and SODO construction

Last update: 9 a.m. Wednesday, Aug. 12

This information changes frequently so please check back often. Travelers can also call 5-1-1 or for real-time traffic and weather updates. For city street closure information check with the Seattle Department of Transportation.

I-5

Maintenance

Highway: I-5    Region: Northwest    County: King    Location: Milepost(s) 162 - 168
ContactAngie Millar, Communications, 206-440-4457
Description: The I-5 express lanes are used 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:

  • Friday, August 14 to the morning of Saturday, August 15 – The left three lanes of southbound I-5 between 45th Street and Boylston will close from 9 p.m. to 9 a.m.
  • Saturday, August 15 to the morning of Sunday, August 16 – The right three lanes of southbound I-5 between 45th Street and Boylston will close from 9 p.m. to 9 a.m.
  • Saturday, August 15 to the morning of Sunday, August 16 – The 45th Street on-ramp to southbound I-5 will close from 9 p.m. to 9 a.m.
  • Saturday, August 15 to the morning of Sunday, August 16 – The southbound I-5 Roanoke Street off-ramp will close from 9 p.m. to 9 a.m.

Express Lanes Schedule Changes

Highway: I-5    Region: Northwest    County: King    Location: Milepost(s) 165.29 - 172.43
ContactAngie Millar, Communications, 206-440-4457
Description: The I-5 express lanes are used 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: Ed Kane, Project Engineer, 425-225-8743
Description: WSDOT contractor crews are replacing 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 webpage
Work schedule:

  • No lane or ramp closures are scheduled.

Sound Transit's East Link Extension - E130

Highway: I-5    RegionNorthwest    County: King    Location: Milepost(s) 164.00
ContactZack 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

  • No lane or ramp closures are scheduled.

Express Lanes Entrances Electronic Sign Replacement - #9272

Highway: I-5    Region: Northwest    County: King    Location: Milepost(s) 165.39 - 172.61
Contact: Ed Kane, Project Engineer, 425-225-8743
Description: WSDOT contractor crews are replacing the sign structures and brackets, along with the electrical and fiber optic systems at seven entrances to the I-5 express lanes. A few of the sign structures will also be redesigned to create a better viewing angle.
Project webpage
Work schedule:

  • No lane or ramp closures are scheduled.

SR 99

NB Duwamish River Bridge Select Grid Deck Replacement - #9510 

Highway: SR 99    RegionNorthwest    County: King    Location: Milepost(s) 26.01​ - 27.17 
Contact: Mike Askarian, Project Engineer, 206-768-5861
Description: WSDOT contractor crews will replace 14 grid deck panels on the northbound SR 99 Duwamish River Bridge. Project webpage
Work schedule:

  • Sunday, Aug. 9, to the morning of Friday, Aug. 14 - Northbound SR 99 between the First Avenue South on-ramp and the South Michigan Street off-ramp will close from 10 p.m. to 5 a.m. nightly. 
  • Sunday, Aug. 9, to the morning of Friday, Aug. 14 - The West Marginal Way on-ramp to northbound SR 99 will close from 10 p.m. to 5 a.m. nightly. 
  • Sunday, Aug. 9, to the morning of Friday, Aug. 14 - The Occidental Avenue South on-ramp to northbound SR 99 will close from 10 p.m. to 5 a.m. nightly. 
  • Sunday, Aug. 9, to the morning of Friday, Aug. 14 - The First Avenue South on-ramp to northbound SR 99 will close from 10 p.m. to 5 a.m. nightly. 
  • Sunday, Aug. 16, to the morning of Wednesday, Aug. 19 - Northbound SR 99 between the First Avenue South on-ramp and the South Michigan Street off-ramp will close from 10 p.m. to 5 a.m. nightly. 

SR 99 Tunnel Maintenance

Highway: SR 99    RegionNorthwest    County: King    Location: Milepost(s) 30.36 - 32.86
Contact: Joe Calabro, Communications, 206-440-4452
Description: WSDOT maintenance crews are checking operational systems inside the SR 99 tunnel. 
Work schedule:

  • Thursday, Aug. 13, to the morning of Friday, Aug. 14 - The southbound SR 99 tunnel  will close from 10:30 p.m. to 4 a.m.

Alaskan Way Viaduct Replacement Project - #9160

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 in downtown Seattle.
Project webpage
Work schedule:

  • No lane or ramp closures scheduled. 

Alaskan Way Viaduct Demolition, Decommissioning & Surface Street Project - #9127

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 demolishing the Alaskan Way Viaduct in downtown Seattle. 
Project webpage
Work schedule:

  • No lane or ramp closures scheduled. 

Roy St to N 145th St Paving & ADA Compliance - #9256

Highway: SR 99    Region: Northwest    County: King    Location: Milepost(s) 32.90 - 40.48
Contact: Mike Askarian, Project Engineer, 206-768-5861
Description: WSDOT contractor crews are grinding and repaving both directions of SR 99 between Roy Street and North 145th Street in Seattle. Dozens of curb ramps are also being rebuilt or added to provide better sidewalk connections for people of all abilities.
Project webpage
Work schedule:

  • No lane or ramp closures scheduled. 

SR 513

Montlake Bridge Maintenance

Highway: SR 513    RegionNorthwest    County: King    Location: Milepost(s) 0.19
Contact: Joe Calabro, Communications, 206-440-4452
Description: WSDOT maintenance crews are making repairs to the grid deck of the Montlake Bridge. 
Work schedule:

  • No lane or ramp closures scheduled.

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

Highway: SR 520    Region: Northwest    County: King    Location: Milepost(s) 0.29 - 3.00
Contact: SR 520 Bridge Replacement & HOV Program, 206-770-3554
Description: WSDOT contractor crews are making safety and mobility improvements on SR 520 between Lake Washington and I-5.
Project webpage
Work schedule:

  • Friday, August 7 to the morning of Monday, August 10 – Both directions of SR 520 between 92nd Avenue and Montlake Boulevard will close from 11 p.m. Friday to 5 a.m. Monday.