SR 520 Bridge Replacement and HOV Program


The westbound SR 520 off-ramps to Montlake and Lake Washington boulevards will be closed this weekend, Sept. 21-22, for construction. Read more about this closure and other SR 520 news in our latest email update. For the most up-to-date information about SR 520 construction activities and planned road closures, check our SR 520 Construction Corner and its interactive construction map. You also can view Montlake Project construction photos taken daily, 'round the clock, by four mounted construction cameras.

Current News

Join us Saturday for the grand opening of our Montlake Project Information Center 

SR 520 Montlake Project Information Center

We've opened a neighborhood drop-in office in Montlake to give the community another way to reach us regarding the SR 520 Montlake Project. Please join us Saturday, Sept. 21, from 9 a.m. to noon for the center's grand opening. Our project team will be on hand -- with coffee, pastries and giveaways -- to address your questions and comments about our ongoing work. Located at 2209 E. Lake Washington Blvd., the center's regular hours are Mondays and Wednesdays from noon to 6 p.m., Tuesdays and Thursdays from 8 a.m. to noon, and the third Saturday of each month from 9 a.m. to noon. We hope to see you there!

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. Built in stages, the construction program's completed and planned improvements extend from I-405 in Bellevue to I-5 in Seattle.

map of the SR 520 corridor's major projects

Click on the map above to visit our SR 520 Major Projects webpage.


Phone: 206-770-3500
Find SR 520 Program contact information: Contact Us


Eastside projectPontoon project