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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

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.

#HumansOf520: Tell us why you’re looking forward to using the SR 520 trail and be featured in upcoming media!

Do you plan to use the new SR 520 trail after it crosses Lake Washington to Montlake? If so, we'd like to hear your story and share it with the community -- like we've done here with Lauren's plans for commuting to work

Read our ombudsman's community report

Our new ombudsman for the SR 520 Program is responsible for looking into community concerns or suggestions about our construction work and its effects on neighborhoods in the corridor. Read his October report to the community to learn about the issues he's been investigating.

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 .

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 Project