I-405 construction

Last Update: 12:05 p.m. Friday, Oct. 12

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, Oct. 15, to the morning of Wednesday, Oct. 17 Three lanes of northbound I-405 between SR 167 and Talbot Road South will be closed nightly from midnight to 4:15 a.m.
  • Monday, Oct. 15, to the morning of Friday, Oct. 19 – Two lanes of southbound I-405 between the Benson Bridge and SR 167 will be closed nightly from 11 p.m. to 4 a.m.
  • Wednesday, Oct. 17, to the morning of Friday, Oct. 19 – Two lanes of northbound I-405 between SR 167 and Talbot Road South will be closed nightly from midnight to 4:30 a.m.

Ramp Closures

  • Monday, Oct. 15, to the morning of Friday, Oct. 19 – 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.
  • Monday, Oct. 15, to the morning of Friday, Oct. 19 – The northbound I-405 ramp to northbound SR 167 will be closed nightly from 10 p.m. to 4:30 a.m. A signed detour will be in place.
  • Monday, Oct. 15, to the morning of Friday, Oct. 19 – The northbound 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.
  • Monday, Oct. 15, to the morning of Friday, Oct. 19 – 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.

* 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, Oct. 8, to the morning of Friday, Oct. 12 – 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, Oct. 8, to the morning of Friday, Oct. 12 – The intersection of East Valley Road and Southwest 19th Street will be closed from 7 a.m. to 5 p.m. One lane of East Valley Road will remain open, with flaggers directing traffic through the work site.
  • Monday, Oct. 15, to the morning of Friday, Oct. 19 – One lane of southbound Talbot Road South between the northbound I-405 on-ramp and the southbound I-405 off-ramp will be closed daily from 4:30 a.m. to 3:30 p.m.
  • Monday, Oct. 15, to the morning of Friday, Oct. 19 – The intersection of East Valley Road and Southwest 19th Street will be closed daily from 7 a.m. to 5 p.m. One lane of East Valley Road will remain open with flaggers directing traffic through the work site.
 

Sound Transit's East Link Extension - E320

Highway: I-90    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:

  • Monday, Oct. 8, to the morning of Friday, Oct. 12 - The right lane of the southbound I-405 ramp to westbound I-90 will be closed from 8 p.m. to 5 a.m. nightly.
 

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:

  • Wednesday Oct. 17, to the morning of Friday, Oct. 19 - The Northeast 6th Street on-ramp to southbound I-405 will be closed from 9 p.m. to 5 a.m. nightly. This work is weather-dependent. 
  • Wednesday Oct. 17, to the morning of Friday, Oct. 19 -  The northbound I-405 off-ramp to Northeast 6th Street will be closed from 9 p.m. to 5 a.m. nightly. This work is weather-dependent. 
  • Wednesday Oct. 17, to the morning of Friday, Oct. 19 - The Northeast 8th Street on-ramp to southbound I-405 will be closed from 10 p.m. to 5 a.m. nightly. This work is weather-dependent. 
  • Wednesday Oct. 17, to the morning of Friday, Oct. 19 - Two lanes of southbound I-405 at Northeast 6th Street will be closed from 10 p.m. to 5 a.m. nightly. This work is weather-dependent. 
  • Wednesday Oct. 17, to the morning of Friday, Oct. 19 - Two lanes of northbound I-405 at Northeast 6th Street will be closed from 10 p.m. to 5 a.m. nightly. This work is weather-dependent. 

 

Bothell: I-405 maintenance

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 22.61 - 23.67
ContactJoseph Calabro, communications, 206-440-4452
Description: WSDOT maintenance crews will repair a stretch of pavement. 
Work schedule:

  • From Sunday, Oct. 14, to the morning of Thursday, Oct. 18 - The right lane of northbound I-405 at SR 522 will be closed from 10 p.m. to 5 a.m. nightly. 
  • From Sunday, Oct. 14, to the morning of Thursday, Oct. 18 - The Northeast 160th Street on-ramp to northbound I-405 will be closed from 9 p.m. to 5 a.m. nightly. A signed detour will be available.