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SR 520 Bridge Replacement and HOV Program


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

Current News

Visit our open houses - in person or online - for the latest on future SR 520 construction in Seattle  
Join us at our in-person open house on Tuesday, June 28, to learn about WSDOT's planned improvements to SR 520's west side corridor in Seattle -- the "Rest of the West." If you can't make it, view the meeting's display boards online. Or log in to our online open house, through July 8, where you also can send us feedback on the next phase of west side construction.

The latest bridge-noise updates, including a June 20 noise analysis report and June 13 presentation to the Medina City Council, have been posted on our Floating Bridge and Landings What's Happening Now webpage.

Photo of west truss removal from the old floating bridgeLearn more about removal of the old SR 520 floating bridge from Lake Washington in our decommissioning folio and a June 9 presentation to local mayors. You also can read the project's many environmental reports and permits

The new floating bridge's bicycle and pedestrian path is expected to open later this summer as an out-and-back trail from Medina. The path will reach Seattle when the West Approach Bridge North is completed in summer 2017. Check out our Bicycle and Pedestrian Connections webpage for more information about riding and walking the SR 520 corridor. 

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:  



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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