As of January 2026

Construction updates 

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

Construction overview

Timeline: 2024 - 2026

Schedule is subject to change: 

• (COMPLETE) April 2024 - January 2025: Full closure of 145th at I-5 
• (COMPLETE) August 25 - September 17, 2025 - Short term closure of I-5 ramps and I-5 overpass 
• (COMPLETE) September 2025 - West-side roundabout at 145th and I-5 interchange open with reduced lanes
• March 2026 - Short term full closure of northbound I-5 off-ramp and I-5 overpass
• Early 2026 -  East-side roundabout at 145th and I-5 interchange open with reduced lanes
• Spring 2026 - Final paving, both roundabouts open with two lanes

Construction: Johansen Construction Company

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

We are in construction on the City’s 145th Street Corridor Phase 1 and 145th Street and I-5 Interchange projects. Future phases of the 145th Corridor Project are in design.

For everyone's safety, please reduce your speed while driving through the area, as it is an active work zone. Please pay attention to the construction signs and barrels as the configuration of the road will change periodically during construction. With one lane open in each direction, it may take longer to drive through the area. Drivers should give themselves plenty of time to travel and consider using alternative routes.   

We greatly appreciate everyone’s patience during construction. For regular updates about construction activities, visit Engage Shoreline: 145th Corridor Projects. 

24/7 construction hotline: 206-899-5127

Tree Impacts

The 145th 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/148th 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

Visit the City's community engagement website Engage Shoreline to find the most up to date information on the project. 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 two-lane 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.