133rd Ave Grid Rd Ext & Roundabout

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Project Overview

Following completion of the 133rd Avenue NE extension to Woodinville-Snohomish Rd, construction of a new roundabout at the intersection of Woodinville-Snohomish Rd and Little Bear Creek Parkway (NE 177th Place) began in summer 2025. The project is designed to improve traffic flow, enhance safety, and strengthen connections for people traveling by vehicle, bicycle, and foot.

A key feature of the project is a dedicated pedestrian and bicycle tunnel beneath the roundabout. The tunnel provides uninterrupted access for Eastrail users while reducing conflicts with vehicle traffic at the intersection.

Traffic Impacts

Beginning Monday, September 14, traffic patterns around the construction zone will change:

➡️ Little Bear Creek Pkwy (NE 177th Place) will reopen to eastbound traffic only, through 134th St.

⬅️ Woodinville-Snohomish Rd will be open to westbound traffic only, from the Woodinville Post Office to Southbound 133rd Ave NE.

While 132nd Ave will be partially closed, local access to the surrounding businesses will be available and appreciate your continued support.

  • Local access to businesses will remain open
  • Traffic flaggers on-site to manage business access and traffic flow.
  • Brief delays are expected as construction vehicles enter and exit the work zone

Roundabout Project Benefits

  • Improved Traffic Flow: Roundabouts keep vehicles moving more efficiently than traditional signalized intersections, helping reduce delays and improve travel times.
  • Reduced Congestion: The project provides an alternative route through downtown, helping relieve traffic on the heavily traveled NE 175th Street corridor.
  • Safter Trail Crossings: A dedicated Eastrail tunnel beneath the roundabout allows pedestrians and cyclists to cross safely, separated from vehicle traffic.
  • Better Downtown Connections: The roundabout improves access to and from downtown for drivers, cyclists, and pedestrians.
  • Enhanced Public Spaces: The project creates opportunities for landscaping, pollinator-friendly plantings, public art, and future trail corridor improvements
  • Roundabout Public Art: The center of the roundabout will feature River, a sculpture created by Wildheart Designs. The artwork will serve as a visual landmark and contribute to the character and identity of the corridor.




Stay Informed

Check this page regularly for project updates, construction schedules, and traffic information or follow the City on social media for the latest updates. Learn about the history of the 133rd Ave NE roundabout.

Project Overview

Following completion of the 133rd Avenue NE extension to Woodinville-Snohomish Rd, construction of a new roundabout at the intersection of Woodinville-Snohomish Rd and Little Bear Creek Parkway (NE 177th Place) began in summer 2025. The project is designed to improve traffic flow, enhance safety, and strengthen connections for people traveling by vehicle, bicycle, and foot.

A key feature of the project is a dedicated pedestrian and bicycle tunnel beneath the roundabout. The tunnel provides uninterrupted access for Eastrail users while reducing conflicts with vehicle traffic at the intersection.

Traffic Impacts

Beginning Monday, September 14, traffic patterns around the construction zone will change:

➡️ Little Bear Creek Pkwy (NE 177th Place) will reopen to eastbound traffic only, through 134th St.

⬅️ Woodinville-Snohomish Rd will be open to westbound traffic only, from the Woodinville Post Office to Southbound 133rd Ave NE.

While 132nd Ave will be partially closed, local access to the surrounding businesses will be available and appreciate your continued support.

  • Local access to businesses will remain open
  • Traffic flaggers on-site to manage business access and traffic flow.
  • Brief delays are expected as construction vehicles enter and exit the work zone

Roundabout Project Benefits

  • Improved Traffic Flow: Roundabouts keep vehicles moving more efficiently than traditional signalized intersections, helping reduce delays and improve travel times.
  • Reduced Congestion: The project provides an alternative route through downtown, helping relieve traffic on the heavily traveled NE 175th Street corridor.
  • Safter Trail Crossings: A dedicated Eastrail tunnel beneath the roundabout allows pedestrians and cyclists to cross safely, separated from vehicle traffic.
  • Better Downtown Connections: The roundabout improves access to and from downtown for drivers, cyclists, and pedestrians.
  • Enhanced Public Spaces: The project creates opportunities for landscaping, pollinator-friendly plantings, public art, and future trail corridor improvements
  • Roundabout Public Art: The center of the roundabout will feature River, a sculpture created by Wildheart Designs. The artwork will serve as a visual landmark and contribute to the character and identity of the corridor.




Stay Informed

Check this page regularly for project updates, construction schedules, and traffic information or follow the City on social media for the latest updates. Learn about the history of the 133rd Ave NE roundabout.

  • Construction Updates 2026

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    Construction Update 9/4/26: Traffic patterns around the roundabout construction zone will change.

    Beginning Monday, Sept 14, traffic patterns around the roundabout construction zone will change:

    ➡️ Little Bear Creek Pkwy (NE 177th Place) will reopen to eastbound traffic only, through 134th Street.

    ⬅️ Woodinville-Snohomish Rd will be open to westbound traffic only, from the Woodinville Post Office to Southbound 133rd Ave NE.

    While 132nd Ave will be partially closed, local access to the surrounding businesses will be available and appreciate your continued support. Please drive carefully through the construction zone and expect brief delays as

    Construction Update 9/4/26: Traffic patterns around the roundabout construction zone will change.

    Beginning Monday, Sept 14, traffic patterns around the roundabout construction zone will change:

    ➡️ Little Bear Creek Pkwy (NE 177th Place) will reopen to eastbound traffic only, through 134th Street.

    ⬅️ Woodinville-Snohomish Rd will be open to westbound traffic only, from the Woodinville Post Office to Southbound 133rd Ave NE.

    While 132nd Ave will be partially closed, local access to the surrounding businesses will be available and appreciate your continued support. Please drive carefully through the construction zone and expect brief delays as construction vehicles move in and out of the work area. The roundabout is anticipated to open by the end of September.

    Construction Update 6/2/26: Little Bear Creek Pkwy Closure

    Construction crews are shifting work on the 133rd Ave NE roundabout project to the west side of the site, resulting in a temporary traffic change. Starting Thursday, June 11, a portion of Little Bear Creek Pkwy (177th Pl) will be closed to through traffic access from east of Homeward Pet to 134th Ave NE. Local access to businesses will remain open during the closure. As the closure begins, access to Woodinville-Snohomish Rd will reopen. Please use caution when traveling through the work zone.

    • Local access to businesses will remain open
    • Traffic flaggers will be on-site to manage local access vehicle flow
    • Expect brief delays as construction vehicles enter and exit the work zone

    The road is anticipated to reopen by late summer, 2026 when the roundabout has been completed.



    Construction Update: 2/17/26: Woodinville-Snohomish Rd Closure

    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 will reopen on June 11, 2026, when the roundabout work shifts to the west side of the site along Little Bear Creek Parkway. 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

    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.