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SR 520 Bridge Replacement and HOV Program


For information about SR 520 closures and construction activities, visit our SR 520 Orange Page.

Current News

Submit your stories and photos of the Grand Opening of the world's longest floating bridge at our new Grand Opening Memories webpage. Select submissions will be posted on the site. Need inspiration? Visit our Grand Opening Flickr album to relive the weekend's events.    

The April 25 opening of eastbound lanes on the new floating bridge, shown at right, is a crowning achievement for the SR 520 construction program. This time-lapse video shows the final weekend of construction to switch eastbound traffic onto the new bridge. You also can watch the April 11 maiden voyage of westbound traffic on the new bridge.

The new floating bridge's bicycle and pedestrian path will open in late May/early June as an out-and-back trail from Medina. The path will reach Seattle when the West Approach Bridge North is completed in summer 2017. Check out our Bicycle and Pedestrian Connections webpage for more information about riding and walking the SR 520 corridor. 

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

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