Skip Top Navigation

SR 520 Bridge Replacement and HOV Program


Massive concrete pontoons for the new SR 520 floating bridge now stretch more than a quarter mile into Lake Washington from the bridge’s easternmost pontoon, shown here in the foreground. 

Building a new and improved SR 520 corridor

The SR 520 Bridge Replacement and HOV Program will enhance safety by replacing the aging floating bridge and keep the region moving with vital transit and roadway improvements throughout the corridor.

The 12.8-mile highway begins at I-5 in Seattle and extends to SR 202 in Redmond.

SR 520 Projects - Click a project title for more information
SR 520 Projects - Click project titles for more information


Contact information:

E-mail: SR520bridge@wsdot.wa.gov

Phone: 206-770-3500

Infoline: 1-888-520-NEWS (6397)

24-hour construction hotline: 206-708-4657

Mail: SR 520 Bridge Replacement and HOV Program
999 3rd Avenue, Suite 900
Seattle, WA 98104

Sign up for email updates about the SR 520 program

Questions about tolling?

Call 1-866-936-8246 or visit Good to Go!


Medina to SR 202: Eastside Transit and HOV ProjectPontoon Construction Project