SR 520 Bridge Replacement and HOV Program


The eastbound lanes of SR 520 will close for construction work from 11 p.m. Friday, Jan. 29 to 5 a.m. Monday, Feb. 1, between Montlake Boulevard and 92nd Avenue Northeast. This is the first of four directional closures of SR 520 in coming weeks so crews can set large concrete girders for a new freeway lid in Montlake. 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

Read our recap of SR 520 Program highlights in 2020

2020 was a challenging year for everyone, but our SR 520 Program staff and contractor crews still managed to make great progress with the highway corridor’s reconstruction. Read our program administrators’ email update for a summary of our 2020 highlights, along with a peek at what’s in store for SR 520 work in 2021 and beyond. 

What a difference a year makes

side by side photos showing SR 520 construction progress from December 2019 to December 2020

These east-facing photos, taken one year apart, show the progress WSDOT contractor crews have made building temporary work platforms (at right) and removing the old SR 520 bridge over Union Bay. Crews on the SR 520 Montlake Project are cutting up large sections of the highway's old west approach bridge for removal by truck. They're also using the platforms to build a seismically resilient, three-lane bridge between Montlake and the SR 520 floating bridge. Once that new eastbound bridge opens, expected in 2023, the north span will revert back to a westbound-only bridge.

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