As of April 2019
Phase: Design 

We’ve been hard at work designing improvements for the 145th Street Corridor between Aurora Avenue N (including transition to Linden Avenue) and I-5. We held an Open House for the public to view preliminary design work and provided a brief presentation at Shoreline City Hall on April 17, 2019.

The City is continuing to seek additional funding for the SR-523 (N/NE 145th Street), Aurora Avenue N to I-5 . As of March 2019, Shoreline has received $4,235,000 in federal funding for design of the project.

Design Elements

The corridor will reflect the Preferred Design Concept approved by Shoreline Council on April 11, 2016. Design is focused on improving intersection safety and operations to reduce delays in traffic and create better access for pedestrians moving along the corridor and accessing the future light rail station at 145th Street and I-5. Design elements are expected to include:

  • Improvements to signalized intersections, adding left turn lanes and adjusting signal timing.
  • A new signal at Ashworth Avenue.
  • Improved sidewalks and crosswalks, pedestrian countdown signals, and ADA accessible curb ramps.
  • A strengthened off-corridor bicycle network.
Typical Intersection at
Ashworth, Meridian, and 1st Avenue 
Aerial graphic view of a typical intersection on N/NE 145th Street
Graphic view of a typical intersection cross-section on N/NE 145th Street



The City of Shoreline conducted the 145th Street Multimodal Corridor Study in 2015-2016 to evaluate current conditions for all users of the corridor and consider transportation demands that will be the result of a future light rail station at approximately 145th Street and I-5. By working closely with the community and key stakeholders, the City tailored the improvements to maximize benefit while keeping community impacts to a minimum.

As a result of this study, Shoreline has received federal funding to complete design on two sections of the corridor: this project from Aurora Avenue (SR-99) to I-5 and the I-5 Interchange area. Both of these projects are now in the design phase. A third section of the corridor from I-5 east to Bothell/Lake City Way is a part of Sound Transit 3 that was approved in November 2016. Sound Transit will be addressing improvements on this eastern portion of 145th Street to incorporate Bus Rapid Transit (BRT) service, working with the City to engage the community and gather feedback from the public.

Project Funding

The City is in the early phases of design for the SR-523 (N/NE 145th Street), Aurora Avenue N to I-5 Project. The design and environmental phases are estimated to cost $4.896 million, of which $4.235 million is funded by a federal grant. Overall costs to complete improvements along this part of the corridor are currently estimated at $44.9 million.

Given the estimate for improvements and the competitive nature of grant funding, once design is completed for this section of the 145th Street corridor from Aurora Avenue N to I-5, the City will likely construct the improvements in up to three separate phases, similar to how the Aurora Corridor was implemented. Currently, the City is seeking funding for a segment from I-5 to Corliss Avenue. The City will continue to seek additional funding for each of the construction phases.

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