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SR 520 - Medina to SR 202: Eastside Transit and HOV Project


View a simulated rendering of the new Eastside Transit and HOV Project:
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Evening congestion headed west on SR 520 toward 92nd Avenue NE.


November 2014


Check out SR 520 Highway Closures Web page for latest closure information

What's happening now on the SR 520 Eastside project?

Eastside SR 520 HOV lane update

  • Coming this year: New inside HOV lanes between Lake Washington and I-405. Learn more...

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Why is WSDOT enhancing the Eastside transit and HOV system?

SR 520 is a busy regional corridor that connects key Eastside communities, including Bellevue, Kirkland and Redmond. Population and employment have steadily grown in these communities over the past several years, leading to increased traffic and transit demand.

This rise in congestion – and a roadway designed for the 1960s – has led to frustrating commutes and unreliable transit travel times.

The End Result
The Eastside Transit and HOV Project will complete and improve the 8.8-mile HOV system from Evergreen Point Road to the SR 202 interchange.

The improved six-lane corridor will include two general-purpose lanes and one transit/HOV lane in each direction.

New inside HOV lanes west of 108th Avenue Northeast will align with new median transit stops and direct-access ramps for carpools and buses. The existing outside HOV lanes east of I-405 will remain in place until traffic patterns and transportation planning efforts show a change is needed.

Project Benefits

The Eastside Transit and HOV Project will provide transit service and mobility improvements along with environmental and community enhancements.

Planned Eastside transit service and mobility improvements:

  • Regional bicycle and pedestrian path.
  • Direct-access ramp to 108th Avenue NE for carpools and transit.
  • Wider, safer shoulders.
  • A transit/HOV lane through the entire Eastside corridor.  
  • Improvement of the Evergreen Point Road Park and Ride.
  • Median transit stops at Evergreen Point Road and 92nd Avenue NE.

Environmental and community enhancements

  • Fish habitat improvements.
  • Noise reduction techniques.
  • Stormwater treatment and detention facilities between Evergreen Point Road and 108th Avenue NE.
  • New lids at Evergreen Point Road, 84th Avenue NE and 92nd Avenue NE.

What is the project timeline?

  • Spring 2010 - Completed environmental process.
  • 2010/2011 - Received permits.
  • Spring 2011 - Began construction.
  • Summer 2014 - Open to drivers.

Financial Information

This project is fully funded by a variety of state and federal sources, including SR 520 tolling that began in December 2011.

We awarded a $306 million contract to Eastside Corridor Constructors for the Eastside project. 

Visit the SR 520 Costs, Funding and Tolling page for additional information.

How can I get more information?


  • E-mail: @WSDOT_520
  • Hotline: 425-998-5200
  • Mail:
    Eastside Corridor Constructors
    3075 112th Ave. NE, Suite 201
    Bellevue, WA 98004

SR 520 program

  • E-mail:
  • Phone: 206-770-3500
  • Infoline: 1-888-520-NEWS (6397)
  • Twitter: @WSDOT_520
  • Mail
    SR 520 Bridge Replacement and HOV Program
    999 3rd Avenue, Suite 2200
    Seattle, WA 98104

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