133rd Ave NE Grid Road Extension & Roundabout

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The City of Woodinville has completed the extension of 133rd Avenue NE - an important addition to the downtown street grid that strengthens local and regional connections.

As part of this improvement, a new roundabout is being built at the intersection of Woodinville-Snohomish Road and Little Bear Creek Parkway (NE 177th Place), enhancing traffic flow and improving overall intersection safety.

The project also features a dedicated pedestrian and bicycle tunnel beneath the roundabout. The underground crossing allows the Eastrail users to pass safely and seamlessly through the roundabout, maintaining uninterrupted access for trail users while minimizing conflicts with vehicles


PROJECT UPDATE: Feb 17, 2026

Construction activities will resume on Monday, February 23, 2026, as winter weather conditions improve. Sarting February 23, Woodinville-Snohomish Road will again be fully closed to traffic between 132nd Ave NE and east of the Woodinville Post Office for construction of the new roundabout.

  • Local access to businesses will remain open
  • Traffic flaggers will be on-site to manage local access vehicle flow
  • Expect brief delays as construction trucks move in and out of the area

The road is anticipated to reopen by late spring 2026.

Scroll to the bottom of this page and click the Project Updates tab for the latest updates.





Key Benefits

  • Smoother Travel, Every Day: The roundabout will keep vehicles moving more smoothly than traditional signalized intersections, reducing backups and improving travel times.
  • Reduced Congestion: Provides an alternative route through downtown to help relieve pressure on the heavily traveled NE 175th Street corridor.
  • Safe Crossings for People, Not Just Cars: The dedicated Eastrail Trail tunnel beneath the roundabout ensures the public can cross safely, separated from vehicle traffic.
  • Better Downtown Access: Improves connections to and from downtown, supporting access for drivers, cyclists, and pedestrians alike.
  • An Open Canvas for Nature and Art: Creates space for improved landscaping, pollinator pathways, public artwork, and future enhancements along the trail corridor.



Public Art Roundabout Selection



Unlocking the Eastrail Corridor

The roundabout and tunnel project is the first phase of Woodinville’s broader Eastrail Corridor initiative, a 1.7-mile multi-use trail connecting Woodinville to the regional Eastrail system. This roundabout project resolves a critical access and infrastructure challenge, unlocking the corridor and enabling future phases of the Eastrail vision.

The City of Woodinville has completed the extension of 133rd Avenue NE - an important addition to the downtown street grid that strengthens local and regional connections.

As part of this improvement, a new roundabout is being built at the intersection of Woodinville-Snohomish Road and Little Bear Creek Parkway (NE 177th Place), enhancing traffic flow and improving overall intersection safety.

The project also features a dedicated pedestrian and bicycle tunnel beneath the roundabout. The underground crossing allows the Eastrail users to pass safely and seamlessly through the roundabout, maintaining uninterrupted access for trail users while minimizing conflicts with vehicles


PROJECT UPDATE: Feb 17, 2026

Construction activities will resume on Monday, February 23, 2026, as winter weather conditions improve. Sarting February 23, Woodinville-Snohomish Road will again be fully closed to traffic between 132nd Ave NE and east of the Woodinville Post Office for construction of the new roundabout.

  • Local access to businesses will remain open
  • Traffic flaggers will be on-site to manage local access vehicle flow
  • Expect brief delays as construction trucks move in and out of the area

The road is anticipated to reopen by late spring 2026.

Scroll to the bottom of this page and click the Project Updates tab for the latest updates.





Key Benefits

  • Smoother Travel, Every Day: The roundabout will keep vehicles moving more smoothly than traditional signalized intersections, reducing backups and improving travel times.
  • Reduced Congestion: Provides an alternative route through downtown to help relieve pressure on the heavily traveled NE 175th Street corridor.
  • Safe Crossings for People, Not Just Cars: The dedicated Eastrail Trail tunnel beneath the roundabout ensures the public can cross safely, separated from vehicle traffic.
  • Better Downtown Access: Improves connections to and from downtown, supporting access for drivers, cyclists, and pedestrians alike.
  • An Open Canvas for Nature and Art: Creates space for improved landscaping, pollinator pathways, public artwork, and future enhancements along the trail corridor.



Public Art Roundabout Selection



Unlocking the Eastrail Corridor

The roundabout and tunnel project is the first phase of Woodinville’s broader Eastrail Corridor initiative, a 1.7-mile multi-use trail connecting Woodinville to the regional Eastrail system. This roundabout project resolves a critical access and infrastructure challenge, unlocking the corridor and enabling future phases of the Eastrail vision.

  • Construction Updates 2026

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    Construction Update: 2/17/26

    Sarting Monday, February 23, Woodinville-Snohomish Road will again be fully closed between 132nd Ave NE and just east of the Woodinville Post Office for construction of the new roundabout.

    • Local access to businesses will remain open
    • Traffic flaggers will be on-site to manage local access vehicle flow
    • Expect brief delays as construction trucks move in and out of the area

    The road is anticipated to reopen by late spring 2026. The City appreciates the public’s patience and cooperation during this significant construction project.

  • Construction Updates 2025

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    Construction Update 12/15/26

    Construction activities will pause for the winter beginning December 22 and are scheduled to resume on February 23, 2026, when winter weather conditions improve. The project remains on schedule for completion summer 2026.

    Key Dates and Traffic Impacts

    • Friday, December 19, 2025 at 5:00 p.m.
      Woodinville-Snohomish Road, from 132nd Avenue NE to just east of the Woodinville Post Office, will reopen to traffic.

    • Monday, February 23, 2026
      Woodinville-Snohomish Road, from 132nd Avenue NE to just east of the Woodinville Post Office, will close again as construction resumes.

    The City appreciates the community's patience and cooperation during this project and for the continued support. Please check back in mid-February 2026 for future updates as construction progresses.


    Construction Update 10/29/25

    Work crews are currently moving and leveling earth around the new tunnel being built beneath the future roundabout. This critical groundwork will create gently sloped entryways into the tunnel, improving safety and accessibility for pedestrians and cyclists who will be able to cross under 133rd Avenue NE once the project is complete.

    The section of Woodinville–Snohomish Road that is currently closed is expected to reopen by the end of this year. Construction activity will pause for the winter season in mid-December and is anticipated to resume at the end of February 2026.


    Construction Update 9/3/25

    Project: 133rd Avenue Roundabout Construction

    A full road closure will begin on September 8 on Woodinville-Snohomish Road, extending from 132nd Avenue NE to just east of the Woodinville Post Office.

    Key Information:

    • Local access to businesses within the closure area will be maintained.
    • Traffic flaggers will be on-site to manage vehicle flow and ensure safety.
    • Intermittent stops are expected as trucks enter and exit the work zone.

    The City appreciates the community’s understanding and cooperation during this important infrastructure project. The road is expected to reopen by the end of 2025.