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SR 520 Bridge Replacement and HOV Program


For the most up-to-date information about SR 520 construction activities and planned closures, check our SR 520 Orange Page.

Current News

Learn about next phase of SR 520 construction in Seattle
More than 250 people attended our April 17 open house in Montlake to learn more about the next phase of SR 520 construction in Seattle. Miss the meeting? You'll find all of the open house's informational boards in our Resource Library.

Find your happy on the SR 520 Trail

runners on the SR 520 Trail

Rain or shine, the regional SR 520 Trail, now open between Seattle and the Eastside, offers a great way to get some fresh air and take in some great views. You'll find useful trail-connection maps on our new SR 520 Trail webpage, and a pictorial history of the trail in our newest SR 520 Flickr album.

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

SR 520 Program map

Project photos on Flickr

View the latest SR 520 project photos on Flickr .

Construction cameras

View archived photos taken 'round the clock by mounted 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 ProjectEastside projectPontoon project