I-405 construction

Last update: 4:10 p.m. Friday, Jan. 18

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

  • Monday, Jan. 21, to the morning of Tuesday, Jan. 22 – Two lanes of northbound I-405 between SR 167 and Talbot Road South will be closed nightly from midnight to 4 a.m.
  • Tuesday, Jan. 22, to the morning of Friday, Jan. 25 – Three lanes of northbound I-405 between SR 167 and Talbot Road South will be closed nightly from midnight to 4 a.m.

Ramp closures

  • * Tuesday, Jan. 22, to the morning of Friday, Jan. 25 – The southbound SR 167 ramp to northbound I-405 will be closed nightly from 10 p.m. to 4 a.m. A signed detour will be in place.
  • * Monday, Jan. 21, to the morning of Friday, Jan. 25 – 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.
  • * Tuesday, Jan. 22, to the morning of Friday, Jan. 25 – The northbound SR 167 ramp to northbound I-405 will be closed nightly from 10 p.m. to 4 a.m. A signed detour will be in place.

* 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, Jan. 14, to the afternoon of Friday, Jan. 18 – One lane of southbound Talbot Road South between the northbound I-405 on-ramp and the southbound I-405 off-ramp will be closed from 4:30 a.m. to 3:30 p.m.
  • Monday, Jan. 14, to the afternoon of Friday, Jan. 18 – One lane of northbound Talbot Road South between the northbound I-405 on-ramp and the southbound I-405 off-ramp will be closed from 9 a.m. to 2:30 p.m.
  • Monday, Jan. 14, to the afternoon of Friday, Jan. 18 – One lane of northbound East Valley Road between Southwest 19th Street and Taylor Avenue Southwest will be closed from 7 a.m. to 5 p.m.
  • Tuesday, Jan. 22, to the afternoon of Thursday, Jan. 24 – One lane of southbound Talbot Road South between the northbound I-405 on-ramp and the southbound I-405 off-ramp will be closed from 4:30 a.m. to 3:30 p.m.
  • Tuesday, Jan. 22, to the afternoon of Thursday, Jan. 24 – One lane of northbound Talbot Road South between the northbound I-405 on-ramp and the southbound I-405 off-ramp will be closed from 9 a.m. to 2:30 p.m.
  • Tuesday, Jan. 22, to the afternoon of Thursday, Jan. 24 – One lane of northbound East Valley Road between Southwest 19th Street and Taylor Ave Southwest will be closed from 7 a.m. to 5 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:

  • No lane or ramp closures are scheduled.

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:

  • No lane or ramp closures are scheduled.

Bothell Tolling Maintenance Work

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 26.75
Contact: Ally Barrera, communications, 206-440-4457
Description: WSDOT crews will perform tolling maintenance along southbound I-405 near Bothell.
Work schedule:

  • Tuesday, Jan. 22, to the morning of Wednesday, Jan. 23 - The HOV lane of southbound I-405 at SR 527 will be closed from 9 p.m. to 4 a.m.