King County construction

Last update: 3:45 p.m. Friday, July 19
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 - 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, weather-dependent.
  • Sunday, July 7, to the morning of Tuesday, July 9 - The 304th Street on-ramp to eastbound SR 18 will close from 9 p.m. to 5 a.m. nightly.
  • Wednesday, July 10, to the morning of Friday, July 12 - The right lane of eastbound SR 18 between SE 312th Way and SE 256th Street will close from 8 p.m. to 5 a.m. nightly. 
  • Wednesday, July 10, to the morning of Thursday, July 11 - The Southeast 304th Street on-ramp to eastbound SR 18 will close from 9 p.m. to 5 a.m.
  • Thursday, July 11, to the morning of Friday, July 12 - The eastbound SR 18 ramp to SR 516 will close from 9 p.m. to 5 a.m. 
  • Saturday, July 13, to the morning of Monday, July 15 - The eastbound SR 18 off- and on-ramps to and from SR 516 willl close from 9 p.m. to 5 a.m. nightly. 

Hobart to Snoqualmie 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 perform various tasks between Issaquah-Hobart Road and I-90. 
Work schedule:

  • High impact: Friday, July 19, to the afternoon of Sunday, July 21 - SR 18 between Issaquah-Hobart Road and I-90 will fully close from 9 p.m. Friday to 1 p.m. Sunday. 

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: Jim Slavicek, Project Engineer, 206-768-5602
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 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, July 8, to the morning of Friday, July 12 - 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

  • No lane closures are scheduled at this time.

Ramp closures

  • Monday, July 22, to the morning of Wednesday, July 24 – 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.
  • Monday, July 22, to the morning of Wednesday, July 24 – 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.

City street closures

  • Monday, July 15, to the afternoon of Friday, July 19 – Two lanes of northbound East Valley Road between Southwest 19th Street and Taylor Avenue Southwest will be closed from 8 a.m. to 5 p.m. Flaggers will flag vehicles through one lane.
  • Monday, July 22, to the afternoon of Friday, July 26 – 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:  

  • No lane or ramp closures are scheduled.

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.

City of Woodinville Sammamish Bridge Replacement

Highway: SR 202    Region: Northwest    County: King    Location: Milepost(s) 0.31 - 0.55
Contact: Joseph Calabro, Communications, 206-440-4452
Description: Contractor crews working for the city of Woodinville will widen SR 202 (NE 175th St.) from the intersection of 131st Avenue NE to Woodinville-Redmond Road.
Work schedule:

  • No lane or ramp closures 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

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: Jim Slavicek, Project Engineer, 206-768-5602
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:

  • No lane or ramp closures are scheduled.

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: Jim Slavicek, Project Engineer, 206-768-5602
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, July 14, to the morning of Monday, July 15 - A single lane of eastbound SR 518 between 1st Avenue and SR 99 will close from 9 p.m. to 5 a.m.
  • Monday, July 15, to the evening of Friday, July 19 - A single lane in both directions of 42nd Avenue South at SR 518 will close from 7 a.m. to 6 p.m. daily.
  • Monday, July 15, to the morning of Tuesday, July 16 - A single lane of the westbound SR 518 off- and on-ramps to and from Airport Expressway will close from 10 p.m. to 4:30 a.m. daily. 
  • Tuesday, July 16, to the morning of Wednesday, July 17 - A single lane of eastbound SR 518 between First Avenue South and SR 99 will close from 9 p.m. to 5 a.m. 
  • Tuesday, July 16, to the morning of Thursday, July 18 - A single lane of the Airport Expressway on-ramp to eastbound SR 518 will close from 9 p.m. to 5 a.m.
  • Thursday, July 18, to the morning of Friday, July 19 - A single lane of the westbound SR 518 off-ramp to Airport Expressway will close from 10 p.m. to 4:30 a.m.
  • Thursday, July 18, to the morning of Friday, July 19 - The westbound SR 518 ramp to southbound SR 99 will close from 9 p.m. to 4:30 a.m.
  • Thursday, July 18, to the morning of Friday, July 19 - The westbound SR 518 ramp to South 154th Street will close from 9 p.m. to 4:30 a.m.

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:

  • Wednedsay, July 24  and Thursday, July 25 - The right lane of southbound SR 599 near South 133rd Street will close from 4 a.m. to 1 p.m. daily. 
  • Wednedsay, July 24 and Thursday, July 25 - The left lane of northbound SR 599 between 42nd Avenue South and the Metro Bus Barn will close from 9:30 a.m. to 5 p.m. daily.