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Travel Advisory | We’re installing the Northgate Pedestrian & Bicycle Bridge spans the weekends of June 12-13 and June 19-20; expect short overnight I-5 closures

The bridge spans were delivered in February and March. Photo Credit: SDOT.


  • We are installing the two Northgate Pedestrian & Bicycle Bridge spans! 
  • Early Sunday morning closures are planned on Sunday, June 13 and Sunday, June 20.
    • Northbound I-5 will be closed between Lake City Way and Northgate Way from 11:59 PM on Saturday, June 12 to 4 AM on Sunday, June 13. The northbound on ramp at NE 85th St will also be closed, with traffic there being detoured to Aurora Ave. 
    • Southbound I-5 will be closed between Northgate Way and NE 85th St from 11:59 PM on Saturday, June 19 to 4 AM on Sunday, June 20. 
  • We look forward to welcoming you to walk, roll, and bike over the bridge this fall! 

It’s all coming together! During the weekends of June 12-13 and June 19-20, we’ll install the two bridge spans for the Northgate Pedestrian & Bicycle Bridge.  

Each span has been assembled in the median of I-5, and will be moved into place using remotely-controlled self-propelled transporters, and lifted into place by cranes. 

Two separate closures of I-5 are required and will take place over consecutive weekends.  

Saturday, June 12 to Sunday, June 13 

The first span installation will take place from 11:59 PM on June 12 to 4 AM on June 13.  During this time, northbound I-5 will be closed between Lake City Way and Northgate Way. Traffic will be detoured onto Lake City Way NE. The northbound on ramp at NE 85th St will also be closed, with traffic there being detoured to Aurora Ave. 

Setup activities will begin as early as 9 PM. 

Saturday, June 19 to Sunday, June 20 

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The second span installation will take place from 11:59 PM on June 19 to 4 AM on June 20. During this time, southbound I-5 will be closed between Northgate Way and NE 85th St. Traffic will be detoured onto SR 99.  

Setup activities will also begin as early as 9 PM.

During the installation of the bridge spans over I-5, please plan ahead and allow for extra travel time. If you’re making a longer trip and don’t need to go to Seattle, you can avoid the detour entirely by taking I-405 to bypass Seattle. For your safety and that of others, please keep your eyes on the road while work is taking place, and to pay careful attention to site signage, traffic alerts, and email updates leading up to the weekend closures.  

The Northgate Bridge will provide a safe and easy connection between the future Northgate Link Light Rail Station and North Seattle College for people walking, rolling, and biking. The bridge will reunite two neighborhoods that have been divided by I-5 for nearly 60 years, and also connect with bike routes leading to Greenwood, Phinney Ridge and Crown Hill via the Aurora Licton Springs Stay Healthy Street. The project has been made possible thanks to the voter-approved Levy to Move Seattle as well as funding from Sound Transit and Washington State Department of Transportation. 

The bridge is on track to be completed in time for the Northgate Link light rail station opening in October. 

For more information: