King County construction

Last update: 4:20 p.m. Friday, May 17

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

If a highway is not listed below, there are no scheduled lane closures at this time, although emergency lane closures may still occur.

SR 18

EB Soosette Creek to Holder Creek Paving & Deck Overlay - #9345

Highway: SR 18    Region: Northwest    County: King    Location: Milepost(s) 8.90 - 20.42
Contact: Mike Askarian, Project Engineer, 206-768-5861
Description: WSDOT contractor crews are repaving eastbound SR 18 between Southeast 304th Street in Auburn and Southeast 256th Street in Covington. Crews are also resurfacing the westbound SR 18 overpass at Issaquah-Hobart Road.
Project webpage
Work schedule:

  • Wednesday, May 1 & Thursday, May 2 - The right lane of westbound SR 18 at Issaquah-Hobart Road will be closed from 6 a.m. to noon daily. 
  • Thursday, May 2, to the morning of Friday, May 3 - The 304th Street on-ramp to eastbound SR 18 will be closed from 9 p.m. to 5 a.m. This work is weather-dependent.
  • Thursday, May 2, to the morning of Friday, May 3 - The eastbound SR 18 off-ramp to SR 516 will be closed from 9 p.m. to 5 a.m. This work is weather-dependent.
  • Thursday, May 2, to the morning of Friday, May 3 - The SR 516 on-ramp to eastbound SR 18 will be closed from 9 p.m. to 5 a.m. This work is weather-dependent.
  • Saturday, May 4 - The right lane of westbound SR 18 at Issaquah Hobart Road will be closed from 6 to 9 a.m.
  • High Impact - Sunday, May 12, to the morning of Monday, May 13 - All lanes of westbound SR 18 at Issaquah-Hobart Road willl be closed from 10 p.m. to 5 a.m. During this time, travelers will use the Issaquah-Hobart Road off- and on-ramps to bypass the work zone, with a uniformed police officer directing traffic at the intersection.
  • High Impact - Beginning Monday, May 13 - A single lane of westbound SR 18 at Issaquah-Hobart Road will be closed around-the-clock for approximately 65 days beginning at 5 a.m. 

South King County Maintenance

Highway: SR 18    Region: Northwest    County: King    Location: Milepost(s) 0.77 - 2.88
Contact: Joseph Calabro, Communications, 206-440-4452
Description: WSDOT maintenance crews are grinding and repaving portions of SR 18 at Weyerhauser Way and SR 167. 
Work schedule:

  • Tuesday, May 14, to the morning of Wednesday, May 15 - The right lane of eastbound SR 18 at Weyerhauser Way will close from 9 p.m. to 4 a.m.
  • Thursday, May 16, to the morning of Friday, May 17 - The westbound SR 18 off-ramp to northbound SR 167 will fully close from 9 p.m. to 4 a.m. 
  • Wednesday, May 29, to the morning of Thursday, May 30 - The right lane of the Weyerhauser Way on-ramp to eastbound SR 18 will close from 9 p.m. to 4 a.m.

SR 99

Pierce County Line to S 359th St Vic Paving - #9397

Highway: SR 99    Region: Northwest    County: King    Location: Milepost(s) 6.15 - 7.46
Contact: Aleta Borschowa, Project Engineer, 206-768-5601
Description: WSDOT contractor crews are grinding and repaving both directions of SR 99 between the Pierce County line and South 359th Street in Federal Way.
Project webpage
Work schedule:

  • No lane or ramp closures are scheduled.

Downtown Seattle/SODO Construction Closures

Highway: SR 99    Region: Northwest    County: King    Location: Milepost(s) 29.00 - 34.30
Description: There are several projects affecting vehicle and pedestrian traffic on SR 99 and city streets through downtown Seattle and SODO.
Work schedule:

 SR 161 

Millton Rd Vic to SR 18 Paving & ADA Compliance - #9350

Highway: SR 161    Region: Northwest    County: King    Location: Milepost(s) 35.32 - 36-25
Contact: Mike Askarian, Project Engineer, 206-768-5861
Description: WSDOT contractor crews are grinding and repaving both directions of SR 161 between Milton Road South and SR 18 in Federal Way. Crews will also assess the transitions from sidewalks to crosswalks, known as curb ramps, and upgrade them when necessary to provide better sidewalk connections for people of all abilities.
Project webpage
Work schedule:

  • Monday, May 13, to the morning of Tuesday, May 14 - The two right lanes of northbound and southbound SR 161 at South 356th Street will close from 9 p.m. to 5 a.m. Flaggers will direct traffic.
  • Monday, May 13, to the morning of Friday, May 17 - One right lane in each direction of SR 161 between South 356th Street and 16th Avenue South will close from 9 p.m. to 5 a.m. nightly. 
  • Tuesday, May 14, to the morning of Wednesday, May 15 - One right lane in each direction of SR 161 betwen Milton Road and SR 18 will close from 9 p.m. and 5 a.m. 
  • Tuesday, May 14, to the morning of Wednesday, May 15 - Southbound SR 161 between South 348th Street and South 352nd Street will fully close from 9 p.m. to 5 a.m. 
  • Wednesday, May 15, to the morning of Friday, May 17 - One left lane of SR 161 in each direction between South 356th Street and South 348th Street will close from 9 p.m. to 5 a.m. nightly. 

SR 167 

City of Kent - S 224th Street Improvement Project

Highway: SR 167    Region: Northwest    County: King    Location: Milepost(s) 21.39 - 21.73
Contact: Matthew Scarsella, City of Kent Project Engineer, 253-872-6750
Description: City of Kent contractor crews are widening 88th Avenue South/South 218th Street to a three-lane roadway.
Project webpage
Work schedule:

  • Monday, May 13, to the morning of Friday, May 17 – The HOV lane of southbound SR 167 between South 212th Street and Burlington Northern Railroad will close from 10 p.m. to 6 a.m. nightly.

I-405/SR 167 Interchange Direct Connector - #8811

Highway: SR 167    Region: Northwest    County: King    Location: Milepost(s) 24.80 - 26.26
Contact: Craig Smiley, Communications, 425-456-8624
Description: WSDOT contractor crews are building a new flyover ramp connecting the HOT lanes on SR 167 to the carpool lanes on I-405 in Renton.
Project webpage
Work schedule:

Lane closures

  • Friday, May 17, to the morning of Saturday, May 18, and Sunday, May 19, to the morning of Monday, May 20 – Up to two lanes of northbound SR 167 between South 180th Street and I-405 will be closed from 11 p.m. to 6 a.m. All traffic will be detoured to the northbound SR 167 to I-405 ramps.

Ramp closures

  • Friday, May 17, to the morning of Monday, May 20 – The southbound I-405 ramp to Rainier Avenue South will be closed nightly from 10 p.m. to 4 a.m. A signed detour will be in place.
  • Friday, May 17, to the morning of Monday, May 20 – The southbound I-405 ramp to southbound SR 167 will be closed nightly from 11 p.m. to 4:30 a.m. A signed detour will be in place.
  • Friday, May 17, to the morning of Saturday, May 18 – The northbound SR 167 HOV ramp to northbound I-405 will be closed nightly from 10 p.m. to 7 a.m. A signed detour will be in place.
  • Saturday, May 18, to the morning of Monday, May 20 – The northbound I-405 ramp to northbound SR 167 will be closed nightly from 10 p.m. to 4 a.m. A signed detour will be in place.
  • Saturday, May 18, to the morning of Sunday, May 19 – The southbound I-405 HOV ramp to southbound SR 167 will be closed nightly from 8 p.m. to 5 a.m. A signed detour will be in place.
  • Saturday, May 18, to the morning of Sunday, May 19 – The southbound I-405 ramp to southbound SR 167 will be closed nightly from 11 p.m. to 4:30 a.m. A signed detour will be in place.

City street closures

  • Monday, May 13, to the afternoon of Friday, May 17 – One lane of northbound East Valley Road between Southwest 19th Street and Taylor Avenue Southwest will be closed from 8 a.m. to 3:30 p.m.

SR 181

SR 516 to W James St. Paving & ADA Compliance - #9355

Highway: SR 181    Region: Northwest    County: King    Location: Milepost(s) 5.32 - 5.89
Contact: Evelyn Pao, Project Engineer, 206-440-4981
Description: WSDOT contractor crews will repair and pave about a half mile of SR 181 between SR 516 and West James Street. Crews will also add pedestrian curb ramps.
Work schedule:  

  • Monday, May 13, to the morning of Friday, May 17 - Southbound SR 181 between West James Street and West Meeker Street will be closed from 9 p.m. to 5 a.m. nightly. A signed detour will be in place.

SR 202

Little Bear Creek Fish Barrier Removal - #8865

Highway: SR 202    Region: Northwest    County: King    Location: Milepost(s) 0.12 - 0.18
Contact: Ed Kane, Project Engineer, 425-225-8743
Description: WSDOT contractor crews are building a buried bridge under SR 202 over Little Bear Creek in Woodinville and removing the existing culvert under the roadway.
Project webpage
Work schedule:

  • No lane or ramp closures are scheduled.

Evans & Patterson Creek Fish Passage - #9269

Highway: SR 202    Region: Northwest    County: King    Location: Milepost(s) 11.74 - 19.78
Contact: Mike Askarian, Project Engineer, 206-768-5861
Description: WSDOT contractor crews are replacing four culverts that pass under SR 202 between Redmond and Fall City. 
Project webpage
Work schedule:

  • No lane or ramp closures are scheduled.

SR 509

Federal Way Maintenance

Highway: SR 509    Region: Northwest    County: King    Location: Milepost(s) 11.26 - 12.02
Contact: Joseph Calabro, Communications, 206-440-4452
Description: WSDOT maintenance crews are grinding and repaving portions of SR 509 between approximately Southwest 306th Street and Southwest 312th Street. 
Work schedule:

  • Thursday, May 30, to the morning of Friday, May 31 - One lane of northbound SR 509 near 21st Avenue Southwest will be shifted from 9 p.m. to 4 a.m. 
  • Friday, May 31, to the morning of June 1 - One lane of southbound SR 509 near Southwest 312th Street will be shifted from 9 p.m. to 4 a.m. 
  • Friday, May 31, to the morning of June 1 - Flaggers will alternate traffic on SR 509 at Southwest 306th Street from 9 p.m. to 4 a.m.

S 192nd St to Normandy Pk & SR 509 to SR 99 Paving & ADA & Deck & Seismic - #9357

Highway: SR 509    Region: Northwest    County: King    Location: Milepost(s) 22.38 - 22.97
Contact: Aleta Borschowa, Project Engineer, 206-768-5601
Description: WSDOT contractor crews are repaving both directions of SR 509 between South 192nd Street and South Normandy Road in Normandy Park/Burien. Crews are also upgrading select curb ramps between Criminal Justice College and Southwest 185th Street in order to create better sidewalk connections for people of all abilities.
Project webpage
Work schedule:

  • Monday, April 22, to the morning of Friday, April 26 - The right lane of westbound SR 518 at I-5 will be closed from 10 p.m. to 5 a.m. nightly. 

Burien Geotechnical Work

Highway: SR 509    Region: Northwest    County: King    Location: Milepost(s) 24.00
Contact: Joseph Calabro, Communications, 206-440-4452
Description: WSDOT crews will perform geotechnical drilling along SR 509 in Burien. 
Work schedule:

  • Wednesday, May 15 - The right lane of southbound SR 509 at the Des Moines Memorial Drive underpass will close from 8 to 9:30 p.m. 
  • Monday, May 20 - The right lane of southbound SR 509 at the Des Moines Memorial Drive underpass will close from 8 to 10 p.m. 
  • Wednesday, May 22 - The right lane of southbound SR 509 at the Des Moines Memorial Drive underpass will close from 8 to 10 p.m. 

S Cloverdale St to Duwamish River Paving & ADA Compliance - #9239

Highway: SR 509    Region: Northwest    County: King    Location: Milepost(s) 27.85 - 29.92
Contact: Aleta Borschowa, Project Engineer, 206-768-5601
Description: WSDOT contractor crews are repaving both directions of SR 509 between South 112th Street and the Duwamish River . Crews are also upgrading select curb ramps in order to create better sidewalk connections for people of all abilities.
Project webpage
Work schedule:

  • No lane or ramp closures are scheduled.

SR 513

Montlake Bridge Closure - Boating Season Parade

Highway: SR 513    Region: Northwest    County: King    Location: Milepost(s) 0.17 - 0.33
Contact: Joseph Calabro, Communications, 425-440-4452
Description: The SR 513 Montlake Bridge will fully close in both directions for the annual Opening Day of Boating Season Parade.
Work schedule:   

  • High Impact - Saturday, May 4 - Both directions of the SR 513 Montlake Bridge will fully close to vehicle traffic from 10 a.m. to 4 p.m. Pedestrian access to the bridge will close from noon to 4 p.m.

SR 515

I-405/SR 167 Interchange Direct Connector - #8811

Highway: SR 515    Region: Northwest    County: King    Location: Milepost(s) 6.93
Contact: Craig Smiley, Communications, 425-456-8624
Description: WSDOT contractor crews are building a new flyover ramp connecting the HOT lanes on SR 167 to the carpool lanes on I-405 in Renton. This ramp will improve traffic flow and safety at this critical interchange.
Project webpage
Work schedule:   

  • No work is scheduled at this time.

SR 518

S 192nd St to Normandy Pk & SR 509 to SR 99 Paving & ADA & Deck & Seismic - #9357

Highway: SR 518    Region: Northwest    County: King    Location: Milepost(s) 0.00 - 3.81
Contact: Aleta Borschowa, Project Engineer, 206-768-5601
Description: WSDOT contractor crews are repaving both directions of SR 518 between South 154th Street in SeaTac and SR 509 in Burien. Crews are also seismically retrofitting two bridges on SR 518 and one bridge at the I-405/I-5 interchange.
Project webpage
Work schedule:

  • No lane or ramp closures are scheduled.

SR 599

SB S 133rd St & 124th St Vic VMS Replacement - #9299 

Highway: SR 599    Region: Northwest    County: King    Location: Milepost(s) 0.28 - 1.18
Contact: Mike Askarian, Project Engineer, 206-768-5861
Description: WSDOT contractor crews are replacing overhead VMS signs on SR 599 in Tukwila.
Work schedule:

  • No lane or ramp closures are scheduled.