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I-405 - Construction Updates

Last update: 4:25 p.m. Wednesday, June 20

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

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, June 18, to the morning of Friday, June 22 – Two lanes of northbound I-405 between SR 167 and Talbot Road South will be closed nightly from 11 p.m. to 4:30 a.m.
  • Monday, June 18, to the morning of Friday, June 22 – Two lanes of southbound I-405 between Talbot Road South and SR 167 will be closed nightly from 11 p.m. to 4 a.m.
  • Tuesday, June 19, to the morning of Friday, June 22 – One lane of southbound I-405 between SR 167 and I-5 will be closed nightly from 8:30 p.m. to 5 a.m.
  • Wednesday, June 20, to the morning of Friday, June 22 – One lane of southbound I-405 between SR 167 and I-5 will be closed nightly from 10 p.m. to 4:30 a.m.

RAMP CLOSURES

  • * Monday, June 18, to the morning of Friday, June 22 – 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, June 18, to the morning of Friday, June 22 – 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.
  • * Wednesday, June 20, to the morning of Friday, June 22 – The southbound SR 167 ramp to southbound I-405 will be closed 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, June 18, to the afternoon of Friday, June 22 – 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 3 p.m.
  • Monday, June 18, to the afternoon of Friday, June 22 – One lane of the Talbot Road South on-ramp to northbound I-405 will be closed from 9 a.m. to 3 p.m.
  • Monday, June 18, to the afternoon of Friday, June 22 – 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, June 18, to the afternoon of Friday, June 22 – Talbot Road South between the northbound I-405 on-ramp and the southbound I-405 off-ramp will be FULLY CLOSED from 10 p.m. to 4:30 a.m. Signed detour routes will be provided for both the southbound and northbound directions of Talbot Road South.
S 188th St to NE 80th St Camera Installation - #9147

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 4.50 - 10.18
Contact: Mark Sawyer, Project Engineer, 425-225-8799
Description: WSDOT contractor crews are installing cameras along I-405 between Coal Creek Parkway in Factoria and Northeast 3rd Street in Renton.
Work schedule:

  • Monday, June 18, to the morning of Monday, June 25 - The left lane of southbound I-405 between Coal Creek Parkway and Northeast 3rd Street will be closed from 9:45 p.m. to 4:45 a.m. nightly. This work is weather dependent.
SB SR 900 to Coal Creek Pkwy SE Paving Outside Lane - #9216

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 10.65
Contact: Mark Sawyer, Project Engineer, 425-225-8799
Description: WSDOT construction crews are repaving nearly 6 miles of the right lane of southbound I-405 between Coal Creek Parkway and SR 900 as well as a portion of the on and off-ramps along that stretch of interstate.
Project webpage
Work schedule:

LANE CLOSURES

  • Monday, June 18, to the morning of Friday, June 22 - Two right lanes of southbound I-405 between Coal Creek Parkway and Northeast Sunset Boulevard/SR 900 will be closed from 9:45 p.m. to 5:30 a.m. nightly. This work is weather dependent.
  • Friday, June 22, to the morning of Sunday, June 24 - Two right lanes of southbound I-405 between Coal Creek Parkway and Northeast Sunset Boulevard/SR 900 will be closed from 9:45 p.m. to 9:30 a.m. nightly. This work is weather dependent.

RAMP CLOSURES

  • Monday, June 18, to the morning of Friday, June 22 - The Northeast Park Drive on-ramp to southbound I-405 will be closed from 10:30 p.m. to 5 a.m. nightly. This work is weather dependent.
  • Monday, June 18, to the morning of Friday, June 22 - The southbound I-405 off-ramp to Northeast Park Drive will be closed from 10:45 p.m. to 4:45 a.m. nightly. This work is weather dependent.
  • Monday, June 18, to the morning of Friday, June 22 - The southbound I-405 off-ramp to Northeast Sunset Boulevard/SR 900 will be closed from 10:45 p.m. to 4:45 a.m. nightly. This work is weather dependent.
  • Friday, June 22, to the morning of Saturday, June 23 - The Northeast Park Drive on-ramp to southbound I-405 will be closed from 10 p.m. to 9 a.m. This work is weather dependent.
  • Friday, June 22, to the morning of Saturday, June 23 - The southbound I-405 off-ramp to Northeast Park Drive will be closed from 10 p.m. to 9 a.m. This work is weather dependent.
  • Friday, June 22, to the morning of Saturday, June 23 - The southbound I-405 off-ramp to Northeast Sunset Boulevard/SR 900 will be closed from 10 p.m. to 8 a.m. This work is weather dependent.
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:

  • Sunday, June 17, to the morning of Friday, June 22 - The southbound I-405 HOV off-ramp to westbound I-90 will be closed from 9 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:

LANE CLOSURES

  • No lane closures are scheduled.

RAMP CLOSURES

  • No ramp closures are scheduled.
Bellevue Paving Work

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 14.85
Contact: Dominick Zimmerman, WSDOT Maintenance, 425-739-3730
Description: WSDOT maintenance crews are paving at the I-405/SR 520 interchange in Bellevue. 
Work schedule:

  • Monday, June 18, to the morning of Tuesday, June 19 - Two right lanes of southbound I-405 at SR 520 will be closed from 10 a.m. to 4 p.m. This work is weather dependent.