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SR 520 Bridge Replacement and HOV Program


From 11 p.m. Friday, Feb. 12, to 5 a.m. Saturday, Feb. 13, all lanes and ramps of SR 520 will be closed between 92nd Avenue Northeast and Montlake Boulevard. For more information, see our SR 520 Orange Page.

Traffic shifted to a new westbound SR 520 off-ramp at 24th Avenue East on Jan. 6. For more information, visit our SR 520 West Approach Bridge North webpage and take a look at our "Frequently Asked Questions."

Two weekend-long closures of SR 520 will occur this spring to shift traffic from the old, four-lane floating bridge to the new, six-lane bridge. This graphic shows how the traffic switch will unfold.

Current News

GO Long 520Save the date for the Grand Opening celebration of the new SR 520 floating bridge, on April 2-3. Visit our grand opening's website at for more information. This family-friendly event will include a community bike ride, fun run, and much more. We hope to see you there!

We made tremendous progress with SR 520 construction in 2015. Learn about the key milestones we hit in the past year and what's in store on the project for 2016 by reading our 2015 Year in Review newsletter.

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

installation of east transition span
See views from live 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