SR 520 - 148th Ave NE Interchange - Overlake Access Ramp

Project news

  • This Connecting Washington project will relocate the existing eastbound SR 520 ramp to southbound 148th Avenue Northeast and add a new eastbound ramp to the Overlake Village area.
  • This project is postponed.
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Needs & Benefits


  • Congestion relief and improved travel times: The current eastbound SR 520 ramp to southbound 148th Avenue Northeast experiences heavy congestion in the Overlake area of Redmond. The congestion causes delayed travel times through the interchange and can result in off-ramp backups that extend onto the SR 520 mainline.
  • Access to future development: On top of current congestion, the Overlake area will continue to grow as the city of Redmond plans for new residential and retail development east of 148th Avenue Northeast, and as Sound Transit builds the Overlake Village Link Light Rail Station. Learn more about Redmond's infrastructure plans for this area.


  • Improved mobility: WSDOT will realign the existing eastbound off-ramp to 148th Avenue Northeast to create space for a new ramp and add a new off-ramp that will cross under 148th Avenue Northeast. This will provide a new eastbound exit option from SR 520.
  • Direct access: The new off-ramp will provide direct access to the Overlake Village retail area.
  • Improves safety: The new routes from SR 520 will reduce the potential for crashes by reducing off-ramp backups as well as weaving traffic on 148th Avenue Northeast.
  • Improved street connections: WSDOT will also coordinate with the city of Redmond on new city street connections, providing travelers timely access to the Overlake Village Light Rail Station and Northeast 24th Street.


2018-2020: Design, engineering and right-of-way acquisition
2020-2022: Construction


Following the passage of I-976, Gov. Inslee directed WSDOT to postpone projects not yet underway. This provides the Governor and the Legislature flexibility to determine how to adjust the funding gap in the 2019-21 transportation budget during the upcoming session. Learn more about the delay and related projects.


Colleen Toomey

SR 520-148th interchange map