Skip Top Navigation

NW Region Map

Click here for construction info in your area Snohomish CountyKing CountyWhatcom, Island and Skagit Counties

Special Events

Curious about a special event and how your commute may be affected? Visit our special events website for more information.

Get Connected

  • Sign up for email updates to get the latest news on highway projects that affect you.
  • Is this webpage helpful to you?

I-405 - Construction Updates

Last update: 2:25 p.m. Friday, Aug. 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

NB S 260th St to Duwamish River Br Concrete Pavement Rehab and ADA - #8992

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 0.00
Contact: Mike Askarian, Project Engineer, 206-768-5861
Description: WSDOT contractor crews are rehabilitating northbound I-5 between South 260th Street in Des Moines and the Duwamish River Bridge in Tukwila.
Project website
Work schedule:

  • **HIGH IMPACT** Friday, Aug. 25, to the morning of Monday, Aug. 28 - Northbound I-5 traffic will be reduced to two lanes between the I-405/SR 518 interchange and the Duwamish River Bridge beginning at 8 p.m. Friday. All lanes will reopen by 5 a.m. Monday. This work is weather dependent.
  • **HIGH IMPACT** Friday, Aug. 25, to the morning of Monday, Aug. 28 - The southbound I-405 HOV off-ramp to northbound I-5 will be closed from 8 p.m. Friday to 5 a.m. Monday. This work is weather dependent.
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 website
Work schedule:

LANE CLOSURES 

  • Monday, Aug. 14, to the morning of Sunday, Aug. 20 – Two lanes of southbound I-405 from SR 169 to SR 167 will be closed nightly from 11 p.m. to 5 a.m.
  • Monday, August 21, to the morning of Friday, August 25 – Two lanes of northbound I-405 from SR 167 to Talbot Road South will be closed nightly from 11 p.m. to 5 a.m.
  • Monday, August 21, to the morning of Sunday, August 27 – Three lanes of southbound I-405 from SR 169 to SR 167 will be closed nightly from 11 p.m. to 5 a.m.

RAMP CLOSURES

  • * Monday, Aug. 14, to the morning of Sunday, Aug. 20 – The southbound I-405 off-ramp to southbound SR 167/Rainier Avenue South will be closed nightly from 11 p.m. to 6 a.m. A signed detour will be in place.
  • * Monday, August 21, to the morning of Saturday, August 26 – The southbound I-405 off-ramp to southbound SR 167/Rainier Avenue South will be closed nightly from 11 p.m. to 6 a.m. A signed detour will be in place.
  • * Monday, August 21, to the morning of Friday, August 25 – The northbound I-405 off-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, August 21, to the morning of Friday, August 25 – The Talbot Road South 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.
  • * Monday, August 21, to the morning of Friday, August 25 – The southbound I-405 ramp to Talbot Road South 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, Aug. 14, to Friday, Aug. 18 – 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 3 p.m.
  • Monday, August 21, to Friday, August 25 – 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 3 p.m.
  • Monday, August 21, to the morning of Friday, August 25 – Talbot Road South between the northbound I-405 on-ramp to the southbound I-405 off-ramp will be FULLY CLOSED from 10:00 p.m. to 4:30 a.m. Signed detours for both the southbound and northbound directions of Talbot Road South will be in place.
NE 6th St to I-5 Widening and Express Toll Lanes Project - #8204

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 19.00 - 21.00
Contact: Craig Smiley, Communications, 425-456-8624
Description: WSDOT contractor crews are building a continuous new northbound and southbound ETL between Northeast 6th Street in Bellevue and SR 522 in Bothell.
Project website
Work schedule:

LANE CLOSURES

  • **HIGH IMPACT** Saturday, Aug. 19, to the morning of Sunday, Aug. 20 -  Three right lanes of southbound I-405 between Northeast 145th Street and Northeast 100th Street will be closed from 8 p.m. to 9 a.m.

RAMP CLOSURES

  • Saturday, Aug. 19, to the morning of Sunday, Aug. 20 - The Northeast 124th Street/Totem Lake Mall on-ramp to southbound I-405 will be closed from 9 p.m. to 8 a.m.
Kirkland Concrete Repair Work

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 20.00
Contact: Doug Young, WSDOT Maintenance, 206-440-5140
Description: WSDOT maintenance crews are performing concrete pavement repair work on I-405 in Kirkland.
Work schedule:

  • Monday, Aug. 21, to the morning of Thursday, Aug. 24 - Up to three lanes in either direction of I-405 between Northeast 124th Street and Northeast 132nd Street will be closed from 10 p.m. to 5 a.m. nightly. This work is weather dependent.
Northbound Peak Use Shoulder Lane Project, SR 527 to I-5 - #8886

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 23.67 - 30.30
Contact: Craig Smiley, Communications, 425-456-8624
Description: WSDOT contractor crews are building a peak-use shoulder lane between SR 527 and I-5.
Project website
Work schedule:

LANE CLOSURES
 

  • Wednesday, Aug. 23, to the morning of Thursday, Aug. 24 – Three left lanes of northbound I-405 between Northeast 6th Street and I-5 will be closed from 11 p.m. to 4 a.m.
  • Thursday, Aug. 24, to the morning of Friday, Aug. 25 – Three left lanes of southbound I-405 between I-5 and Northeast 6th Street will be closed from 11 p.m. to 4 a.m.

RAMP CLOSURES

  • Saturday, Aug. 19, the morning of Sunday, Aug. 20 – The northbound I-405 off-ramp to Northeast 128th Street will be closed from 9 p.m. to 6 a.m.
  • Saturday, Aug. 19, the morning of Sunday, Aug. 20 – The southbound I-405 off-ramp to Northeast 128th Street will be closed from 8 p.m. to 5 a.m.
  • Saturday, Aug. 19, the morning of Sunday, Aug. 20 – The Northeast 128th Street on-ramp to northbound I-405 will be closed from 9 p.m. to 6 a.m.
  • Saturday, Aug. 19, the morning of Sunday, Aug. 20 – The Northeast 128th Street on-ramp to southbound I-405 will be closed from 8 p.m. to 5 a.m.