I-405 construction

Last update: 12:40 p.m. Thursday, March 26

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, Renton to Bellevue Widening and Express Toll Lanes Project - #9242

Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 0.00 - 14.6
Contact: Craig Smiley, Communications, 425-456-8624
Description: WSDOT contractor crews are adding one new lane between SR 167 in Renton and Northeast Sixth Street in Bellevue to create a dual express toll lane system.
Project webpage
Work schedule:

Lane closures

  • No lane closures are scheduled

Ramp closures

  • No ramp closures are scheduled.

City street closures

  • Wednesday, March 25, to the afternoon of Friday, March 27 – 106th Avenue Northeast will be reduced to one lane with flaggers between Hazelwood Lane Southeast and Lake Washington Boulevard Southeast daily from 7 a.m. to 4 p.m.

Trail closures

  • No trail closures are scheduled.

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

  • No lane closures are scheduled

Ramp closures

  • No ramp closures are scheduled

City street closures

  • No city street closures scheduled at this time.

    Sound Transit's East Link Extension - E320

    Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 10.65
    Contact: Charlie Hockett, Sound Transit, (206) 553-3736
    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 scheduled. 

    Renton to Bellevue Culvert Surveillance Project

    Highway: I-405    Region: Northwest    County: King    Location: Milepost(s) 10.65 - 11.25
    Contact: Craig Smiley, Communications, 425-456-8624
    Description: WSDOT contractor crews will inspect storm drains along I-405 from Renton to Bellevue.
    Work schedule:

    • No lane or ramp closures scheduled.