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I-405 - Construction Updates

Last update: 2:54 p.m. Wednesday, Aug. 24, 2016

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: Anne Broache, Communications, 425-450-2729
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:

  • Wednesday, Aug. 31, to the morning of Thursday, Sept. 1 - The left lane of the southbound I-405 off-ramp to SR 515/Talbot Road South will be closed from 9 p.m. to 4:30 a.m.
  • Thursday, Sept. 1, to the morning of Friday, Sept. 2 - The left lane of the southbound I-405 off-ramp to SR 515/Talbot Road South will be closed from 9 p.m. to 4:30 a.m.
Regionwide Safety High Friction Surface - #8876

Highway: I-405    RegionNorthwest    County: King    Location: Milepost(s) 10.65 - 30.30
ContactAleta Borschowa, Project Engineer, 206-768-5601
Description: WSDOT contractor crews are installing a high-friction surface treatment that attaches sand-like aggregate to the roadway to create a grittier road surface that gives tires extra traction in wet weather.
Work schedule:

  • **HIGH IMPACT** Monday, Aug. 29, to the morning of Tuesday, Aug. 30 - The southbound I-5 off-ramp to southbound I-405 will be closed from 11 p.m. to 5 a.m. A signed detour will be in place.
  • **HIGH IMPACT** Monday, Aug. 29 to the morning of Tuesday, Aug. 30 - The southbound I-405 off-ramp to westbound I-90 will be closed from 11 p.m. to 5 a.m. A signed detour will be in place.
Bellevue to Lynnwood Tolling Maintenance Work

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 13.68 - 30.30
Contact: Justin Fujioka, Communications, 206-440-4473
Description: WSDOT maintenance crews are working on maintenance for tolling equipment on I-405 between Bellevue and Lynnwood.
Work schedule:

  • No lane or ramp closures are scheduled.
Bellevue Bridge Inspection Work

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 13.82
Contact: Nicole Daniels, Communications, 206-440-4479
Description: WSDOT maintenance crews are performing bridge inspection on southbound I-405 in Bellevue.
Work schedule:

  • Wednesday, Aug. 31 - The left lane of the southbound I-405 on ramp from NE 8th Street will be closed from 9 a.m. to 10 a.m. A signed detour will be in place.
NE 6th Street to I-5 Widening and Express Toll Lanes - #8204

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 13.68 - 30.30
Contact: Anne Broache, Communications, 425-450-2729
Description: WSDOT contractor crews are building an express toll lane system from downtown Bellevue to Lynnwood.
Project website

The Washington State Department of Transportation is a public agency and is subject to the State of Washington's Public Records Act (RCW 42.56). Therefore, public comments and questions may be made available to anyone requesting them for non-commercial purposes.

BLT map

Work schedule:

RAMP CLOSURES

Bellevue area

  • Wednesday, Aug. 24 to the morning of Thursday, Aug. 25 - The southbound I-405 off-ramp to Northeast 6th Street will be closed from 11 p.m. to 5 a.m. A signed detour will be in place.

Kirkland area

  • Wednesday, Aug. 24 to the morning of Thursday, Aug. 25 - The Northeast 128th Street on-ramp to southbound I-405 will be closed from 8 p.m. to 6 a.m. A signed detour will be in place. Ramp

Bothell/Lynnwood area

  • Wednesday, Aug. 24 to the morning of Thursday, Aug. 25 - The Northeast 160th Street on-ramp to SR 522 will be closed from 9 p.m. to 6 a.m. A signed detour will be in place

LANE CLOSURES

Bellevue area

  • Wednesday, Aug. 24 to the morning of Thursday, Aug. 25 - Up to two left lanes of northbound I-405 between Southeast 8th Street and Northeast 6th Street will be closed from 8 p.m. to 5 a.m.
  • Wednesday, Aug. 24 to the morning of Thursday, Aug. 25 - One left lane of southbound I-405 between SR 520 and Northeast 6th Street will be closed from 7 p.m. to 4:30 a.m.

Kirkland area

  • Wednesday, Aug. 24 to the morning of Thursday, Aug. 25 - One left lane of northbound I-405 between Northeast 70th Place and Northeast 85th Street will be closed from 8 p.m. to 5 a.m.
  • Wednesday, Aug. 24 to the morning of Thursday, Aug. 25 - One left lane of southbound I-405 between Northeast 128th Street and Northeast 85th Street will be closed from 7 p.m. to 4:30 a.m.
  • Wednesday, Aug. 24 to the morning of Thursday, Aug. 25 - Up to two right lanes of southbound I-405 between Northeast 116th Street and Northeast 85th Street will be closed from 7 p.m. to 4:30 a.m

Bothell/Lynnwood area

  • No lane closures are scheduled.
I-405 Bridge Rail Repair Maintenance

Highway: I-405    RegionNorthwest    County: King    Location: Milepost(s) 23.30 - 24.00
Contact: Nicole Daniels, Communications, 206-440-4479
Description: WSDOT maintenance crews are performing bridge rail repair work on southbound I-405 in Bothell.
Work schedule:

  • Wednesday, Aug. 31, to the morning of Thursday, Sept. 1 - The express toll lane of southbound I-405 from Beardslee Boulevard to SR 522 will be closed from 10 p.m. to 4:30 a.m.