As of September 2024

Construction updates 

For the latest construction updates, visit our Engage Shoreline page.

Construction overview

Timeline: 2024-2025

Construction: Johansen Construction Company

Contact: 145thProject@shorelinewa.gov
Project 24/7 hotline: 206-899-5127

Closure of 145th Street extended to early 2025

The long-term closure of N 145th Street between 1st Avenue NE and I-5 in Shoreline has been extended to early 2025. The road was closed on April 2, 2024, so crews could relocate utilities prior to construction of roundabouts on either side of Interstate 5. We expected to reopen the road in November 2024, but due to the complexity of the work and other unforeseen delays, we must extend the closure. Underground utility conflicts and unforeseen existing conditions will take additional time to work through. Weekly construction updates are available at Engage Shoreline: 145th Corridor Projects.

While we know the extended closure and ongoing construction is inconvenient in the short term, the long-term benefits of the 145th Street Corridor Project are significant. Once complete, the project will provide a safer and more accessible route for all forms of transportation. The new roundabouts, updated lanes, pedestrian crossings, and bike lanes will reduce congestion, enhance safety, and create a more connected community. It will also provide easier access to the Link light rail Shoreline South/148th Street Station. 

View a larger version of the image (pdf).

Detour Routes and I-5 Access

Over the seven-month closure, the N 145th Street overpass is reduced to one lane in each direction between the I-5 on- and-off ramps and 5th Avenue NE to maintain access to the interchange. The on- and off-ramps will remain open and be accessible from the east side of I-5 throughout construction.

The primary detour routes when heading east and west will be on N 155th Street and N 130th Street. There are no impacts to traveling north and south on Meridian Avenue N, 1st Avenue NE, and 15th Avenue NE during the closure. However, northbound travelers on 1st Avenue are restricted from turning left to go west on Northeast 155th Street.

View a larger version of the image (pdf).

We have a 24/7 hotline available for people to call with their concerns: 206-899-5127

Tree Impacts

The 145^th Street Corridor and I-5 Interchange projects create exciting opportunities to provide a corridor that reduces traffic congestion and encourages multi-modal use to the Shoreline South/148^th light rail station and other destinations. The corridor currently has 5-foot sidewalks intersected by three-foot utility poles that render the sidewalks impassable to non-ambulatory corridor users and a challenge for those that are ambulatory. Unfortunately, we can’t make the sidewalks more passable and create a dense walkable corridor without significant impacts to the existing trees. These construction projects will remove a combined 317 existing trees. However, we will replace them with 864 new trees.

A significant challenge in planting trees on projects located in dense and developing areas is that there aren’t a lot of open areas. We have taken a critical look at all available spaces and identified strategic locations that will increase the tree canopy and reduce the heat island effect of the expanded roadway and shared use path. We’ve been able to mostly retain the established trees on the south side of the road, while planting new trees in the median and between the westbound lanes and the shared use path.

Arborist reports for each project are listed below:

• 145th Street Corridor Arborist Report
• 145th Street and I-5 Interchange Arborist Report

For further information, please see our FAQs about tree removal for City construction projects.

Engage

The City has recently launched a new community engagement website called Engage Shoreline. There, you can find the most up to date information on the projects. We will use the Engage Shoreline site to communicate the current and upcoming traffic control impacts, recent project milestones, pictures, and any other important updates.

• Engage - 145th Street Corridor and I-5 Interchange Project

Project Background

The 145th Street (SR 523) Corridor is a key east-west connection for the region linking bus rapid transit on Aurora, light rail, and I-5. In need of significant upgrades, the City initiated a master corridor plan in 2015 for improving pedestrian and bicycle mobility, safety and operations, transit speed and reliability, and freight mobility on the corridor (145th Street Multimodal Corridor Study).

The 145th Street Corridor Project and the 145th Street and I-5 Interchange Project are construction projects that support the recommendations of the initial master corridor plan. These two projects share a common project boundary at 1st Avenue NE and will be constructed at the same time, the City has decided to combine the I-5 Interchange Project and 145th Street Corridor Project in to a single contract for construction. Having one general contractor for both projects will improve traffic control through the work zone and will eliminate conflicts having two contractors in the same area. Additionally, the City should benefit from more competitiveness between bidding contractors with a larger project.

For more information on the designs, funding, and planning process for this work, visit the 145th Street Corridor Project and 145th Street and I-5 Interchange Project webpages.

145th Street Corridor Project

The 145th Street Corridor Project will add safety and operational improvements between Linden Avenue and Interstate 5 (I-5), including left turn lanes, street lighting, relocated utilities, a shared-use path in some sections, and sidewalk improvements with off-corridor bicycle facilities. Please visit the 145th Street Corridor project page for additional information on project phasing and construction.

145th Street and I-5 Interchange Project

The 145th Street and I-5 Interchange Project will improve safety and multimodal access along the 145th Street corridor and help connect to the future Sound Transit Shoreline South/145th Link light rail station, planned to open in 2024. The project will replace the signalized intersections on either side of I-5 with roundabouts and update lane configurations on the bridge over I-5.

Please visit the 145th Street and I-5 Interchange project page for additional information on project phasing and status.