SR 522 - Paradise Lake Road Interchange

Project news

  • Design and right-of-way acquisition for this project, along with the Paradise Lake Road to Snohomish River Bridge widening project, has been advanced by the Legislature.
  • WSDOT received $12.8 million in state funds in the 2019-2021 biennium. The $10 million in Connecting Washington funding will now be available in 2021-2023.
  • There is no construction funding to complete the interchange and widening improvement projects on SR 522. The total cost of all improvements is estimated at $180 million.
  • WSDOT has selected a preliminary preferred alternative for interchange improvements. View the concept, along with those that were not chosen, on WSDOT's Flickr page.

Study Report

Study report and supporting documents

Needs & benefits

Drivers regularly experience heavy congestion at the SR 522 Paradise Lake Road intersection. The congestion frequently spills over onto side streets and drivers try to find ways around the bottlenecks on the highway.

An improved interchange, capable of handling more cars more efficiently, will increase traffic flow, decrease congestion, and improve travel times. It will also decrease the risk of rear-end collisions during stop-and-go conditions, greatly improving driver safety.

In June 2018, WSDOT formed a Technical Advisory Group (TAC), consisting of representatives from area communities and agencies, to provide feedback from their communities and make recommendations on an interchange design for the intersection. Over three meetings, TAC members worked with WSDOT to identify the preliminary preferred alternative using criteria such as safety, local street operations, SR 522 operations and forward compatibility. The TAC reviewed forecasted traffic analysis maps, area development plans, community benefits and impacts and project costs. 


  • 2017 - 2019: Preliminary traffic analysis, concept, design and community engagement.
  • Winter 2019: Preliminary preferred alternative selected
  • 2019 - 2023: Continuing design, analysis, community engagement and right-of-way acquisition.


  • $750,000 in the 2017-2019 biennium for initial traffic analysis, design work and community engagement.
  • $12.8 million in the 2019-2021 biennium for additional design, analysis, environmental study, right of way acquisition.
  • $10 million in Connecting Washington funding for design work and right-of-way acquisition becomes available in 2021-2023. This money was originally scheduled to become available in 2025, but the 2019 Legislature advanced the funding. 
  • Project construction is not currently funded.


Kris Olsen
WSDOT communications

SR 522 - Paradise Lake Road Interchange project map thumbnail