I-405 construction

Last update: 2:25 p.m. Friday, August 23

This information changes frequently. Please check back often. Travelers can also call 5-1-1 for real-time traffic and weather updates. If you have questions or comments about I-405 in Washington state that are not addressed by these resources, please contact the I-405 Project Office at 425-456-8585.

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

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 2.32 – 3.96
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:

Lane closures

  • No work scheduled at this time.

Ramp closures

  • No work scheduled at this time.

* Please note that not all the listed ramps will be closed at the same time. Select ramps will remain open to maintain a working detour for the traveling public.

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.
  • Monday, Aug. 26, to the afternoon of Thursday, Aug. 29 – 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.
  • Monday, Aug. 26, to the afternoon of Thursday, Aug. 29 – One lane of northbound Talbot Road South between the northbound I-405 on-ramp to the southbound I-405 off-ramp will be closed from 9 a.m. to 2:30 p.m.

Sound Transit's East Link Extension - E320

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 10.65
Contact: Jason Hampton, Sound Transit, 206-903-7177
Description: Sound Transit crews are constructing the East Link light rail extension from Seattle to Redmond.
Project webpage
Work schedule:

  • Sunday, August 25, to the morning of Monday, August 26 – The northbound I-405 ramp to westbound I-90 will close from 10 p.m. to 5 a.m.
  • Sunday, August 25, to the morning of Monday, August 26 – The southbound I-405 ramp to westbound I-90 will close from 10 p.m. to 5 a.m.
  • Sunday, August 25, to the morning of Monday, August 26 – The southbound I-405 ramp to the westbound I-90 HOV ramp will close from 8 p.m. to 5 a.m.

Sound Transit's East Link Extension - E335

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 10.65 - 14.85
ContactJay Cooper, WSDOT Regional Transit Coordination, 206-716-1102; Ryan Lescouflair, Sound Transit, 206-689-4798
Description: Sound Transit crews are constructing the East Link light rail extension from Seattle to Redmond.
Project webpage
Work schedule:

  • Monday, August 26, to the morning of Tuesday, August 27 – The HOV lane and two lanes of southbound I-405 at Northeast 6th Street will close from 8 p.m. to 5 a.m.
  • Monday, August 26, to the morning of Friday, August 30 – The Northeast 6th Street on-ramp to southbound I-405 will close from 9 p.m. to 5 a.m. nightly.
  • Tuesday, August 27, to the morning of Wednesday, August 28 – The northbound I-405 off-ramp to Northeast 6th Street will close from 9 p.m. to 5 a.m.
  • Tuesday, August 27, to the morning of Wednesday, August 28 – The HOV lane and two lanes of northbound I-405 at Northeast 6th Street will close from 8 p.m. to 5 a.m.
  • High Impact – Wednesday, August 28, to the morning of Thursday, August 29 – All lanes of southbound I-405 at Northeast 6th Street will close from 11:59 p.m. to 4 a.m.
  • Wednesday, August 28, to the morning of Thursday, August 29 – The southbound I-405 off-ramp to Northeast 4th Street will close from 10 p.m. to 5 a.m.
  • Thursday, August 29, to the morning of Friday, August 30 – The northbound I-405 off-ramp to Northeast 6th Street will close from 9 p.m. to 5 a.m.
  • Thursday, August 29, to the morning of Friday, August 30 – The Northeast 4th Street on-ramp to northbound I-405 will close from 10 p.m. to 5 a.m.
  • High Impact - Thursday, August 29, to the morning of Friday, August 30 – All lanes of northbound I-405 at Northeast 6th Street will close from 11:59 p.m. to 4 a.m.

Renton to Bellevue Culvert Surveillance Project

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 10.65 - 11.25
Contact: Craig Smiley, Communications, 425-456-8624
Description: WSDOT contractor crews will inspect storm drains along I-405 from Renton to Bellevue.
Work schedule:

  • No work scheduled at this time.

Kirkland Maintenance

Highway: I-5    Region: Northwest    County: King    Location: Milepost(s) 19.5 - 20.9
ContactThomas Charlson, Communications, 206-440-4699
Description: WSDOT maintenance crews are repairing a roadway panel.
Work schedule:

  • Sunday, August 25, to the morning of Monday, August 26 – The three left lanes of northbound I-405 between Northeast 116th Street and Northeast 132nd Street will close from 8:30 p.m. to 5 a.m.

I-405 - Drilling from SR 522 to SR 527

Highway: I-405    RegionNorthwest    County: King    Location: Milepost(s) 23.3 - 26.75
Contact: Thomas Charlson, communications, 206-440-4699
Description: WSDOT crews are performing drill work from SR 522 to SR 527.
Work schedule:

  • No work scheduled at this time.

Bothell Maintenance

Highway: I-5    Region: Northwest    County: King    Location: Milepost(s) 24.52
ContactThomas Charlson, Communications, 206-440-4699
Description: WSDOT maintenance crews are repairing a roadway panel.
Work schedule:

  • Monday, August 26, to the morning of Wednesday, August 28 – The southbound I-405 off-ramp to Beardslee Boulevard will close from 8 p.m. to 4:30 a.m.