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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

SR 520 Trail now open across Lake Washington 

SR 520 bike path

You can now cross Lake Washington between Seattle and the Eastside on SR 520's bicycle and pedestrian path. We opened the regional trail's segment over Union Bay on Dec. 20. Read our latest blog article to see what some trail enthusiasts have to say about this scenic, carbon-free travel option.

WSDOT launches process for selecting a Montlake Phase design-builder

The SR 520 Program is soliciting qualifications from contractors interested in contract opportunities with the upcoming Montlake Phase of SR 520 reconstruction. Find additional information here.

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