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SR 520 - Floating Bridge and Landings Project: What's Happening Now?


Updated: October 2017 

The new SR 520 floating bridge is open to traffic in both directions.

Current work


Lane and ramp closures

Please visit the SR 520 Orange Page for closure information, including any upcoming closures of the bicycle and pedestrian path on the floating bridge.

Light from new bridge

Over the past year, WSDOT worked with lakeside residents north of the bridge to evaluate several different options for reducing nighttime light visible from light fixtures along the bridge’s bicycle and pedestrian path.
During a June 2017 community meeting, the attendees agreed that installation of louvered shields on the light fixtures was the best option for addressing community needs and meeting established safety and cost criteria.

Bridge crews completed installation of specially manufactured light shrouds in early October 2017.

Shared-use path lighting updates

Meetings and materials 
In June 2017, WSDOT hosted a community meeting to discuss WSDOT’s evaluation of the shared-use path's lights and potential solutions:

In November 2016, WSDOT and representatives from the 46th Legislative District hosted a community meeting to discuss WSDOT’s evaluation of the path's lights. Linked below are the materials presented at the briefing:

In November 2016, WSDOT staff met with elected officials to review the latest results from evaluations of the lights along the regional shared-use path. See the materials presented at the briefing (pdf 2.2 mb).

If you have questions or comments concerning lighting on the new bridge, please contact us at  

Noise from new bridge

The westbound lanes of the new SR 520 floating bridge opened to traffic in April 2016. Soon after, Eastside residents complained about noise that seemed to be coming from the new bridge. Residents of Seattle’s Laurelhurst and Madison Park neighborhoods voiced similar concerns.

In response, WSDOT conducted an investigation that included collecting sound measurements on both the old and new floating bridges. While the measurements showed that noise from the new bridge’s expansion joint fell below the Federal Highway Administration threshold for needing noise abatement, the city of Medina requested that WSDOT investigate ways to modify the joint to reduce the noise. In June 2016, WSDOT committed to working with the city of Medina and the expansion joint manufacturer, Mageba, to explore options for further noise reduction.

After meetings with the city of Medina, evaluations of potential options, and draft pilot-project proposals from Mageba, WSDOT determined that a pilot project would require legislative authorization and funding because of the project duration and estimated costs.

We also heard from some Seattle residents on this topic. The west end of the new bridge is still in an interim configuration as WSDOT and our contractors work to complete the west approach bridges between Montlake Boulevard and the new floating bridge.

  • The West Approach Bridge North opened to traffic in August 2017. Final construction activities, including opening the SR 520 shared-use path to Seattle, are planned to be complete by late fall 2017.
  • Construction of the West Approach Bridge South is expected to begin in 2018.

Meetings and materials

We are keeping track of those who notify us about sounds from the new bridge and will include everyone in future updates. If you have questions or comments concerning this noise question, please contact us at and include on your email.