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SR 520 Bridge Replacement and HOV Program


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

Current News
You're invited to a public meeting on Feb. 28

Please join us on Feb. 28 for a public meeting to hear SR 520 Montlake Phase project updates and information about upcoming public comment opportunities. The meeting will be held from 5 to 7:30 p.m. at the Montlake Community Center in Seattle. It will include a presentation beginning at 5:30 p.m. and provide an opportunity to hear the latest about the Montlake Phase and chat one on one with project staff.

Take look at the past year's key milestones for SR 520 construction in our 2016 Year in Review newsletter (pdf 778kb). You'll also get a peek at what's ahead in 2017 within the SR 520 corridor as we complete the West Approach Bridge North and turn our focus squarely on the "Rest of the West."

final old SR 520 pontoon Crews on Jan. 14 removed from Lake Washington the last of the old floating bridge's 31 pontoons.
Learn about the old bridge's decommissioning in this blog post or folio , or see our list of environmental reports, permits, practices and correspondence . More on the old bridge's removal also can be found on the Floating Bridge and Landings What's Happening Now page. 

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