King County construction

Last update: 7:45 a.m. Thursday, Aug. 22

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:

  • High impact - Monday, Aug. 26, to the morning of Friday, Aug. 30 - All lanes of westbound SR 18 will close at the Issaquah Hobart-Road overpass from 9 p.m. to 5 a.m. nightly. A signed detour will be in place. This work is weather-dependent.
  • Monday, Aug. 26, to the afternoon of Friday, Aug. 30 - A single lane of westbound SR 18 will close at the Issaquah-Hobart Road overpass from 5 a.m. to noon daily. This work is weather-dependent.

SR 99

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, Aug. 26, to the morning of Friday, Aug. 30 - One lane in each direction of SR 161 between Milton Road and SR 18 will close from 9 p.m. to 5 a.m. nightly. This work is weather-dependent.

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:

  • Wednesday, July 24, to the morning of Thursday, July 25 - The HOV lane of northbound SR 167 between 84th Avenue South and South 212th Street will close from 7 p.m. to 4:30 a.m. 
  • Thursday, July 25, to the morning of Friday, July 26 - The HOV lane of southbound SR 167 between 84th Avenue South and South 212th Street will close from 10 p.m. to 6 a.m. 

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

  • Monday, Aug. 19, to the morning of Tuesday, Aug. 20 – Two lanes of northbound SR 167 between South 180th Street and I-405 will be closed from 10 p.m. to 4:30 a.m.

Ramp closures

  • Monday, Aug. 19, to the morning of Tuesday, Aug. 20 – The northbound SR 167 general purpose ramp to northbound I-405 will be closed from 10 p.m. to 4:30 a.m. A signed detour will be in place.
  • Monday, Aug. 19, to the morning of Tuesday, Aug. 20 – The northbound I-405 ramp to southbound SR 167 will be closed from 10 p.m. to 4:30 a.m. A signed detour will be in place.
  • Tuesday, Aug. 20, to the morning of Wednesday, Aug. 21 – The southbound SR 167 ramp to northbound I-405 will be closed from 10 p.m. to 4:30 a.m. A signed detour will be in place.
  • Tuesday, Aug. 20, to the morning of Wednesday, Aug. 21 – The northbound SR 167 HOV ramp to northbound I-405 will be closed from 8 p.m. to 5 a.m. A signed detour will be in place.
  • Tuesday, Aug. 20, to the morning of Wednesday, Aug. 21 – The southbound I-405 ramp to southbound SR 167 will be closed from 11 p.m. to 4:30 a.m. A signed detour will be in place.

City street closures

  • Monday, Aug. 19, to the afternoon of Friday, Aug. 23 – 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 202

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

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: James Harper, Project Engineer, 206-768-5862
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:

  • Sunday, Aug. 18, to the morning of Tuesday, Aug. 20 - A single lane of eastbound SR 518 between SR 509 and 42nd Avenue South will close from 9 p.m. to 5 a.m. nightly. 
  • Monday, Aug. 19, to the morning of Thursday, Aug. 22 - Westbound SR 518 will fully close at the SR 509 intersection from 10 p.m. to 4:30 a.m. nightly.  

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 lane or ramp closures are scheduled.

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: James Harper, Project Engineer, 206-768-5862
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:

  • Sunday, Aug. 18, to the morning of Tuesday, Aug. 20 - A single lane of eastbound SR 518 between SR 509 and 42nd Avenue South will close from 9 p.m. to 5 a.m. nightly. 
  • Sunday, Aug. 18, to the morning of Monday, Aug. 19 - The Des Moines Memorial Drive on-ramp to eastbound SR 518 will close from 9 p.m. to 4:30 a.m.
  • Sunday, Aug. 18, to the morning of Monday, Aug. 19 - The eastbound SR 518 off-ramp to South 154th Street will close from 9 p.m. to 4:30 a.m.
  • Sunday, Aug. 18, to the morning of Monday, Aug. 19 - The eastbound SR 518 off-ramp to Airport Expressway will close from 9 p.m. to 4:30 a.m.
  • Monday, Aug. 19, to the morning of Thursday, Aug. 22 - Westbound SR 518 will fully close at the SR 509 intersection from 10 p.m. to 4:30 a.m. nightly. 

SR 522

City of Bothell Project - Stage 3

Highway: SR 522    Region: Northwest    County: King    Location: Milepost(s) 8.15 - 9.10
Contact: Kevin Stoll, Project Engineer, 425-806-6825
Description: This project is a continuation of the SR 522 Stage 1 and Stage 2 improvements. It will provide road improvements and business access and transit (BAT) lanes from the end of Stage 1 and 2 improvements to 83rd Place NE (the new western City limits). This stage of the project is part of the Sound Transit SR 522/NE 145th Bus Rapid Transit (BRT) project that will widen the existing lanes of SR 522 and create Business Access and Transit (BAT) lanes in both directions. Additionally, this project will add a sidewalk on the north side, install center medians and street lights, and relocate utilities underground.
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.