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Traffic Alerts

Posted on: April 18, 2023

Traffic Alert: 12th Ave NW and SR 900

A roadway improvement project is beginning on Monday, April 24 on 12th Ave NW at the intersection with state Route 900/17th Ave NW and NW Sammamish Road. The project is expected to be completed by early November 2023. 

This construction will:

  • Widen 12th Ave NW and providing an additional left turn lane onto SR 900/17th Ave NW
  • Widen northbound SR 900/17th Ave NW and providing an exclusive right turn lane onto 12th Ave NW
  • Create of protected bike lanes, sidewalks and illumination along 12th Ave NW
  • Update curb ramps and traffic signals at the intersection of 12th Ave NW and SR 900/17th Ave NW/NW Sammamish Road

Work hours will be Monday through Thursday, between 7 a.m.-5 p.m.

Traffic Flow Changes and Detour Route

More Information

Additional details can also be found on the project website. Please prepare for short delays when driving through this area. If you have any questions, please contact Jim Jacobe, Senior Transportation Engineer.

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