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SR 520 Bridge Replacement and HOV Program


Full highway closure Dec. 9-12
All lanes of SR 520 are scheduled to close between Montlake Boulevard and 92nd Avenue Northeast from 11 p.m. Friday, Dec. 9, to 5 a.m. Monday, Dec. 12. During the weekend closure, crews will perform a variety of tasks, including demolition of a segment of old off-ramp crossing over SR 520 in Montlake. 

For more information, check out our SR 520 Orange Page.

Current News

Thanks to those who joined us for our Dec. 7 public meeting at the Graham Visitors Center.
You can find materials from the meeting in our Resource Library.

The new SR 520 floating bridge won a prestigious national award on Nov. 3 as the country's top design engineering project of 2016. In addition, WSDOT received a Vision 2040 Award in October from the Puget Sound Regional Council for completion of the new SR 520 floating bridge. Read more about the highway project in this blog post by Transportation Secretary Roger Millar.  

Learn about the ongoing removal of the old SR 520 floating bridge in this blog post, or check out our decommissioning folio, this presentation, or our list of environmental reports, permits, practices and correspondence.  More on the old bridge's removal can be found on the Floating Bridge and Landings What's Happening Now page. 

Program Overview

The SR 520 Bridge Replacement and HOV Program is enhancing public safety and mobility by replacing the highway's aging, vulnerable bridges and making significant transit and roadway improvements throughout the corridor. The construction program's planned improvements extend from I-5 in Seattle to I-405 in Bellevue.

Click a project title for more information



Project photos on Flickr

View the latest SR 520 project photos on Flickr.

Live construction cameras

See views from live construction cameras.

Contact Information:  



Good To Go!



Phone: 206-770-3500

More information on Program Contact Us


West Approach Bridge North ProjectI-5 to Lake WashingtonFloating Bridge and Landings ProjectEastside Transit and HOV ProjectPontoon Construction Project