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SR 520 Bridge Replacement and HOV Program


For information about current and upcoming SR 520 closures and construction activities, visit our SR 520 Orange Page.

Current News

Pontoons from the old SR 520 floating bridge are floating away. Read about it in this blog post. More on removal of the old bridge can be found in our decommissioning folio, a July 14 presentation, and our list of environmental reports, permits, practices and correspondence. You can find more information in the Decommissioning Materials section of 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