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Weekly update of construction closures in Downtown Seattle and SODO

Last update: 12:35 p.m. Monday, June 26

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: Make sure to check with the Seattle Department of Transportation online or monitor @SeattleDOT on Twitter.

| I-5 | I-90 | SR 99 | SR 513 | SR 520 |

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:

  • Friday, June 30 - The I-5 express lanes will remain in the northbound direction until 5 a.m. Saturday morning due to maintenance work. The lanes will open southbound on the normal weekend schedule.
  • Tuesday, July 4 - The I-5 express lanes will remain in the northbound direction until 5 a.m. Wednesday morning due to maintenance work. The lanes will open southbound on the normal weekday schedule.
  • Friday, July 7 - The northbound I-5 express lanes will close at 11 p.m. then open southbound by 11:59 p.m. due to maintenance work. The lanes will remain southbound through the normal Saturday schedule.
  • Saturday, July 15 - The southbound I-5 express lanes will be closed from 8 to 11 a.m. for maintenance work.
  • Sunday, July 16 - The southbound I-5 express lanes will be closed from 8 to 11 a.m. for maintenance work.
Seattle Fire Testing Work

Highway: I-5    Region: Northwest    County: King     Location: Milepost(s) 165.00 - 166.50
Contact: Nicole Daniels, Communications, 206-440-4479
Description: WSDOT maintenance crews are performing fire detection testing and annual inspection on I-5 underneath the Convention Center in Seattle.
Work schedule:

  • **HIGH IMPACT** Thursday, June 29, to the morning of Saturday, July 1 - Up to three lanes of northbound I-5 between James Street and Mercer Street will be closed nightly beginning with one lane at 11 p.m. All lanes will reopen by 5 a.m.
  • Thursday, June 29, to the morning of Friday, June 30 - The University Street on-ramp to northbound I-5 will be closed from 11 p.m. to 5 a.m.
  • Friday, June 30, to the morning of Saturday, July 1 - The Cherry Street on-ramp to northbound I-5 will be closed from 11 p.m. to 5 a.m.
  • **HIGH IMPACT** Friday, July 7, to the morning of Saturday, July 8 - All lanes of southbound I-5 between Stewart Street and I-90 will be closed from 11:59 p.m. to 5 a.m. Traffic will be detoured onto the city streets.
  • Friday, July 7, to the morning of Saturday, July 8 - The Mercer Street on-ramp to southbound I-5 will be closed from 11:59 p.m. to 5 a.m.
  • Friday, July 7, to the morning of Saturday, July 8 - The Yale Street on-ramp to southbound I-5 will be closed from 11:59 p.m. to 5 a.m.
No lane or ramp closures are scheduled.


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.
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:

  • Monday, June 19, to the morning of Friday, June 23 - Two right lanes of westbound SR 520 on the floating bridge will be closed from 9 p.m. to 6 a.m. nightly.

Traffic Impacts Calendar

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