Last updated: Nov. 19, 2009 at 7:40 a.m.

This Web page contains information about WSDOT construction projects affecting vehicle or pedestrian traffic on SR 99, I-5/I-90 interchange, SR 519 and city streets through downtown Seattle and SODO. 

Construction schedules and activities are subject to weather conditions. Travelers can also call 5-1-1 for real-time traffic and weather updates.
 
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SR 99, SR 519, City of Seattle projects, Special events

Event traffic
Learn more about special events around the Puget Sound that could affect your route.

Last update: 3 p.m., 11/10
I-90/I-5: Lake Washington Active Traffic Management - Sign Bridges #7771
Mark Sawyer, Project Engineer, 425-649-4429
WSDOT crews will install a series of electronic speed-limit and lane status signs over each lane on the SR 520 and I-90 bridges over Lake Washington. On SR 520, there are 19 sign locations between I-5 and 130th Ave NE in Bellevue. This includes new sign bridges and signs that will be mounted on existing structures. On I-90, there are 25 sign locations between I-5 and 150th Avenue SE. This also includes new sign bridges and signs that will be mounted on existing structures.

• Monday, Nov. 16 - Friday, Nov. 20 - We do not expect construction to affect traffic on I-5 this week.
  

Last update: 11:30 a.m., 11/19
SR 99: Alaskan Way Viaduct: South End Replacement Stage 1
Mileposts: 0.19 - 0.34
Paul E. Johnson, Project Engineer, 206-768-5680 
WSDOT is working to replace the southern mile of the viaduct with a new side-by-side roadway, which will include a new undercrossing at S. Atlantic Street. This new section of SR 99 could connect to any future replacement of the viaduct's central waterfront section.

• Monday, Nov. 16 - Friday, Nov. 20 -  Alaskan Way S. between S. Atlantic Street and S. Massachusetts Street will be closed nightly from 9 p.m. to 5 a.m. while crews install electrical vaults and duct banks.
• Thursday, Nov 18 - Crews will close the right turn lane from South Atlantic Street to northbound Alaskan Way South from noon to 3 p.m.
• Monday, Nov 23, - Wednesday, Nov. 25 – Alaskan Way S. between S. Atlantic Street and S. Massachusetts Street will be closed nightly from 9 p.m. to 5 a.m. while crews install electrical vaults and duct banks.
• Friday, Dec. 4 - Monday, Dec. 21 - Access at the intersection of Alaskan Way S. and S. Atlantic Street will change temporarily while crews install a utility vault. Vehicles traveling northbound on Alaskan Way S. will be detoured to First Avenue S.; left turns into Terminal 46 will be prohibited. Westbound S. Atlantic Street will be local access only west of First Avenue S. Vehicles traveling southbound on Alaskan Way S. will be able to proceed as usual through intersection however, left-turns on to eastbound Atlantic Avenue will be prohibited. These changes will be in effect around the clock until the vault work is finished.
• The center turn lane on Alaskan Way S. between S. Atlantic Street and S. Massachusetts Street will be closed through the end of the year while crews relocate utilities. One lane of traffic will be maintained in each direction through the work zone.
• The parking lane on the west side of Alaskan Way S. between S. Royal Brougham Way and S. Dearborn Street will remain closed through mid-November while crews install utility poles.

Last update: 10:15 a.m., 11/17
SR 99: Alaskan Way Viaduct:  Electrical Line Relocation #7575 
Ryan Bianchi, WSDOT Communications, 206-267-6908
WSDOT and Seattle City Light are relocating electrical lines from the viaduct to underground locations east of the viaduct between S. Massachusetts Street and Railroad Way S.

• Until further notice - Crews will reduce traffic to one lane through the intersection of Western Avenue and University Street from 7 a.m. to 5 p.m. A flag crew will alternate traffic through the intersection. Workers are repairing an underground electrical transmission line.
• Parking closures through mid-November - Parking is closed beneath the Alaskan Way Viaduct between S. Massachusetts and S. King streets for construction staging and overhead work.

Last update: 7:15 a.m., 11/17
SR 99: Alaskan Way Viaduct: Central Waterfront Geotechnical Drilling
Heather Santic, WSDOT Communications, 206-267-3789
Crews are conducting geotechnical drillings for the viaduct's central waterfront replacement. We are examining an alternative for this replacement that would move SR 99 into a bored tunnel beneath downtown.

• Friday, Nov. 13 - Wednesday, Nov. 25 - Crews will begin drilling in the parking lot on Stewart Street east of First Avenue from 8 a.m. to 5 p.m. daily. The lot will remain open, but several parking spaces in the lot and on Stewart Street will be unavailable. Crews will also occasionally block the south entrance to the alley on the north side of Stewart Street, but the alley's north entrance will remain open. Drilling is expected to last 5 to 15 days. This work will not affect traffic lanes.

Last update: 10:30 a.m., 11/17
SR 99: Alaskan Way Viaduct: Central Waterfront Utility Survey
Ryan Bianchi, WSDOT Communications, 206-267-6908 
Crews are conducting utility surveys for the viaduct's central waterfront replacement. We are examining an alternative for this replacement that would move SR 99 into a proposed bored tunnel beneath downtown Seattle. Locating subsurface utilities requires crews to remove manhole lids and, in some instances, to directly expose the utility by drilling or digging holes in city streets, parking lanes and sidewalks.

• Monday, Nov. 16 - Friday, Nov. 27- We do not expect work to affect vehicle or pedestrian traffic.

Last update: 10:30 a.m., 11/17
SR 519: Intermodal Access Project #7597
Mileposts: 0.19 - 0.34
Greg Phipps, WSDOT Communications, 206-464-1265
Crews working for WSDOT will improve mobility and safety for traffic heading to the Port of Seattle terminals, Colman Dock ferry terminal, central waterfront area, sports stadiums and destinations in Seattle's SODO neighborhood from I-90 and I-5 to S. Atlantic Street and Royal Brougham Way.

• Friday, November 20 -- Crews will close S. Royal Brougham Way between Occidental Avenue S. and Fourth Avenue S. to through traffic for bridge construction from midnight to 5 p.m. Access to the Qwest Event Center garage will be provided from First Avenue S. and Occidental Avenue S. The westbound lane of S. Royal Brougham Way between Fourth Avenue S. and First Avenue S. will be open to through traffic from 5 p.m. to midnight. A signed detour route will be in place during the closures.
•  Saturday, November 21 – Sunday, November 22 – Crews will close the eastbound lane of S. Royal Brougham Way between the Qwest Event Center garage and Fourth Avenue S. from 12:01 a.m. Saturday to midnight Sunday. Access to the Qwest Event Center garage will be provided from First Avenue S. and Occidental Avenue S. The westbound lane of S. Royal Brougham Way between Fourth Avenue S. and First Avenue S. will be open to through traffic the entire weekend. A signed detour route will be in place during the closures.
•  Monday, November 23 – Wednesday, November 25-- Crews will close S. Royal Brougham Way between Occidental Avenue S. and Fourth Avenue S. to through traffic for bridge construction around-the-clock Monday, November 23 and Tuesday, November 24, and from midnight until noon on Wednesday, November 25.Access to the Qwest Event Center garage will be provided from First Avenue S. and Occidental Avenue S. A signed detour route will be in place during the closures.
• Until February 2010 - Crews will close the sidewalk on the north side of Edgar Martinez Way between Safeco Field and the stairs to the plaza below Edgar Martinez Way. Crews will also close the stairs and the sidewalk on the southbound Fourth Avenue S. ramp to Edgar Martinez Way, I-5, and I-90. The closures are necessary for crews to tie-in the new I-90 off-ramp to the existing Edgar Martinez Way bridge. A detour route for pedestrians will be provided during the closure.
• Until further notice – The right lane of southbound Fourth Avenue S. at S. Royal Brougham Way is closed to protect temporary overhead construction beams. The lane will open before and after major events to allow access to the Qwest Event Center from the east.
• Until Spring 2010 - Crews closed all lanes of Third Avenue S. from S Royal Brougham Way to just south of Edgar Martinez Drive S. around-the-clock to build a new overpass and I-90 off-ramp. Signed vehicle and pedestrian detours will be provided. Check detour information.
   

City of Seattle project information
Learn more about upcoming City of Seattle construction projects that could affect traffic in downtown Seattle and SODO.
To view this information geographically, visit SDOT’s Travelers Information Map.

For additional information about City of Seattle projects and closures please call 206.684.8390 or e-mail construction.coordination@seattle.gov

South Spokane Street Project
The Seattle Department of Transportation (SDOT) is significantly improving the South Spokane Street Viaduct, the 60-year-old elevated roadway that connects I-5 to the West Seattle Bridge.

• Through January 2010 - Eastbound S Spokane Street between East Marginal Way and First Avenue is closed for water main work and re-paving of the roadway.
• Through December 2011 - Westbound S Spokane Street is closed between 4th Ave and First Avenue.

Fourth Avenue Paving Project
The Seattle Department of Transportation (SDOT) will reconstruct most of Fourth Avenue between S Jackson Street and Seneca Street, and replace selected concrete panels between Seneca Street and Olive Way. The work also includes upgraded curb ramps, sidewalk repair, restriping of lane markings and minor drainage improvements.

• Through January 2010 - Paving has begun on Fourth Avenue starting at S Jackson Street and moving north towards James Street. Two lanes will be open to traffic at all times.

Sunday, Nov. 22

• MLS Cup - 5:30 p.m., at Qwest Field
  

Friday, Nov 27

• Macy's Holiday Parade - 8:45 a.m. in downtown Seattle

Saturday, Nov. 28

• New Seattle Marthon and 5K - 8:30 a.m. to 9:30 a.m. in downtown Seattle

Sunday, Nov. 29

• Seattle Marathon and Half Marathon - 7:15 a.m.