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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
Happy birthday, floating bridge! You're a winner!
The new SR 520 floating bridge turned 1 year old on April 25. We saluted the first anniversary of the new span's opening with a short video, an online booklet and a celebratory blog post. But the biggest gift of the day was a prestigious international award the floating bridge project received for engineering excellence. Read all about it and watch this special award video

Cyclists on the regional shared use pathNew cross-lake bike path to reach Montlake this fall
Excited for the new bicycle and pedestrian path along SR 520 to connect Seattle and the Eastside? We are too! We don’t yet know exactly when the path will open from the new floating bridge to Montlake, but it’s on schedule to happen sometime this fall. Stay tuned.

Draft traffic management plan for the Montlake area
We recently held a public meeting and published our draft Neighborhood Traffic Management Plan for the upcoming Montlake Phase of SR 520 construction. Click on these links to view the meeting's presentation slides (pdf 1.8mb) and display boards (pdf 2.8mb), or to read the draft plan (pdf 7.6mb). 

Application for Montlake Phase noise variance 
WSDOT recently applied for a noise variance from the city of Seattle for the upcoming Montlake Phase of SR 520 construction. More information on the application is available on the city of Seattle's website. You can also read materials from a Feb. 28 public meeting, including a presentation (pdf 1.5 mb), display boards (pdf 3 mb), meeting summary (pdf 444 kb) and a short Q&A (pdf 1 mb).
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:  



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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