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

Rolling through summer on the SR 520 Trail

SR 520 Trail photo

The SR 520 Trail hit another milestone in mid-August when our trail-use counter, located near the shared-use path's west end in Montlake, surpassed 220,000 trips in 2018. The digital counter tallies the number of bicyclists and pedestrians who venture onto Lake Washington via the trail. Not surprisingly, warmer weather has meant more trail-goers over the last few months – to the tune of about 10,000 trips a week since June. Haven’t had a chance to visit yet? Our SR 520 Trail webpage has maps, connection information and everything else needed to plan your trip. Happy trails to you!

Learn about next phase of SR 520 construction in Seattle
More than 250 people attended our April 17 open house in Montlake to learn more about the next phase of SR 520 construction in Seattle. Miss the meeting? You'll find all of the open house's informational boards in our Resource Library. You also can read our latest blog, which answers questions and concerns we heard at the open house.


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




Phone: 206-770-3500
More information on Program Contact Us

Eastside projectPontoon project