King County construction

Last update: 4:50 p.m. Friday, Sept. 13

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:

  • Thursday, Sept. 19, to the morning of Friday, Sept. 20 - The left lane of westbound SR 18 between Southeast 272nd Street/SR 516 and 152nd Street Southeast/Kent-Black Diamond Road will close from 8 p.m. to 5 a.m.
  • Thursday, Sept. 19, to the morning of Friday, Sept. 20 - The right lane of westbound SR 18 between Southeast 272nd Street/SR 516 and 152nd Street Southeast/Kent-Black Diamond Road will close from 8 p.m. to 5 a.m.
  • Thursday, Sept. 19, to the morning of Friday, Sept. 20 - The Southeast 272nd Street/SR 516 on-ramp to westbound SR 18 will close from 9 p.m. to 5 a.m.

Tiger Mountain Maintenance

Highway: SR 18    Region: Northwest    County: King    Location: Milepost(s) 20.20 - 27.88
Contact: Joseph Calabro, communications, 206-440-4452
Description: WSDOT maintenance crews will repair asphalt, remove buildup on the shoulders, clear brush and do crack sealing.
Work schedule:

  • High impact: Friday, Sept. 20, to the morning of Sunday, Sept. 22 - All lanes of SR 18 between I-90 and Issaquah-Hobart Road will close from 10 p.m. Friday to noon on Sunday, 

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 

Milton 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:

  • No lane or ramp closures scheduled. 

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:

  • No lane or ramp closures scheduled. 

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

  • Tuesday, Sept. 3, to the morning of Wednesday, Sept. 4 – Two lanes of southbound SR 167 at the I-405 interchange will be closed from 11 p.m. to 5 a.m. Detour will be provided for city streets and southbound SR 167 will be accessible via ramps.
  • Thursday, Sept. 5, to the morning of Friday, Sept. 6 – Two lanes of northbound SR 167 at the I-405 interchange will be closed from 11 p.m. to 4:30 a.m. All traffic will be detoured to northbound SR 167 to northbound I-405.

Ramp closures

  • Wednesday, Sept. 4, to the morning of Thursday, Sept. 5 – The northbound I-405 ramp to southbound SR 167 will be closed nightly from 10 p.m. to 4:30 a.m. A signed detour will be in place.
  • Wednesday, Sept. 4, to the morning of Thursday, Sept. 5 – The southbound SR 167 ramp to northbound I-405 will be closed nightly from 10 p.m. to 4:30 a.m. A signed detour will be in place.
  • Thursday, Sept. 5, to the morning of Friday, Sept. 6 – The northbound SR 167 HOV ramp to northbound I-405 will be closed nightly from 8 p.m. to 5 a.m. A signed detour will be in place.
  • Thursday, Sept. 5, to the morning of Friday, Sept. 6 – 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, Sept. 6, to the morning of Saturday, Sept. 7 – The northbound SR 167 ramp to northbound I-405 will be closed nightly from 10 p.m. to 4:30 a.m. A signed detour will be in place.

City street closures

  • Wednesday, Sept. 4, to the afternoon of Friday, Sept. 6 – 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:

  • Monday, Sept. 16, to the morning of Wednesday, Sept. 18 - A single lane in both directions of SR 202 at Evans Creek will close from 8 p.m. to 6 a.m. nightly.
  • Wednesday, Sept. 18, to the morning of Thursday, Sept. 19 - A single lane in both directions of SR 202 at Patterson Creek will close from 8 p.m. to 6 a.m.
  • Thursday, Sept. 19, to the morning of Friday, Sept. 20 - A single lane in both directions of SR 202 between the East and West Tributaries will close from 8 p.m. to 6 a.m. 

Maintenance near Fall City

Highway: SR 202    Region: Northwest    County: King    Location: Milepost(s) 18.30 - 21.55
Contact: Joseph Calabro, communications, 206-440-4452
Description: Crews are trimming trees in the Fall City area. 

  • Monday, Sept. 9, to the afternoon of Friday, Sept. 13 - A single lane of SR 202 between Duthie Hill Road and Fall City will close from 9 a.m. to 3 p.m. daily. 
  • Monday, Sept. 16, to the afternoon of Friday, Sept. 20 - A single lane of SR 202 between Duthie Hill Road and Fall City will close from 9 a.m. to 3 p.m. daily. 

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:

  • Monday, Sept. 16, to the morning of Wednesday, Sept. 18 - A single lane of eastbound SR 518 between First Avenue and 42nd Avenue South will close from 9 p.m. to 5 a.m. nightly. 
  • Tuesday, Sept. 17, to the morning of Thursday, Sept. 19 - A single lane of westbound SR 518 between 42nd Avenue South and First Avenue will close from 9 p.m. to 9 a.m. nightly.
  • Thursday, Sept. 19, to the morning of Friday, Sept. 20 - A single lane of eastbound SR 518 between First Avenue and 42nd Avenue South will close from 9 p.m. to 5 a.m. nightly. 
  • Monday, Sept. 16, to the evening of Thursday, Sept. 20 - A single lane in each direction of 42nd Avenue South below SR 518 will close from 7 a.m. to 6 p.m. daily. 

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: 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, Sept. 8, to the morning of Friday, Sept. 13 - A single lane in each direction of SR 518 between First Avenue and 42nd Avenue South will close from 9 p.m. to 5 a.m. nightly. 
  • Monday, Sept. 9 and Thursday, Sept. 12 - A single lane in each direction of 42nd Avenue South below SR 518 will close from 7 a.m. to 6 p.m. daily. 

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:

  • Monday, Sept. 9, to the afternoon of Friday, Sept. 13 - A single lane in each direction of SR 522 between 80th Avenue Northeast and 96th Avenue Northeast will close from 9 a.m. to 3 p.m. daily. 

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.

SR 900

Restriping west of Renton

Highway: SR 900    Region: Northwest    County: King    Location: Milepost(s) 8.0 - 8.5
Contact: Joseph Calabro, communications, 206-440-4452
Description: WSDOT maintenance crews will restripe a portion of SR 900 (Martin Luther King Jr. Way) west of Renton city limits. 
Work schedule:

  • Saturday, Sept. 21 - SR 900 at South 133rd Street will be reduced to a single lane in each direction from 5 a.m. to 1 p.m.
  • Sunday, Sept. 22 - Westbound SR 900 at South 133rd Street will be reduced to a single lane from 5 a.m. to 11 a.m.