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I-405 - Renton To Bellevue Project SR 169 to I-90

This project is in the design phase
This is a map of the Renton to Bellevue area along I-405.


October 2014

Why is WSDOT Improving I-405 from Renton to Bellevue?
Drivers on the stretch of I-405 between SR 167 in Renton and Northeast 6th Street in downtown Bellevue face one the most gridlocked routes in the state, particularly during peak travel times. The Renton to Bellevue Widening and Express Toll Lanes project will improve traffic flow and safety by continuing to build improvements from the I-405 Master Plan.

Through this project, WSDOT plans to build one continuous northbound and southbound lane on I-405 between SR 167 in Renton and NE 6th Street in downtown Bellevue. This new lane will be paired with the existing carpool lane to create a two-lane express toll lane system. The completed lanes will connect to the express toll lane system under construction between Bellevue and Lynnwood, resulting in a 40-mile system of express toll lanes.

The Renton to Bellevue project is not yet fully funded for construction. WSDOT would like to use corridor savings to prepare the Renton to Bellevue project for construction.

The End Result
The Renton to Bellevue Project will reduce congestion and improve safety along one of the state’s most congested sections of highway. It will complement nearly $1.5 billion in state investments (and additional investments provided through potential regional funding) along the 40-mile I-405/SR 167 corridor.

Project Benefits

  • Congestion relief. The addition of the northbound and southbound lanes between SR 167 in Renton and NE 6th Street in Bellevue reduces congestion by increasing capacity.
  • Safety. The additional capacity reduces sideswipe and congestion-related collisions.
  • Environment. WSDOT's I-405 Corridor Program team is designing the Renton to Bellevue widening and express toll lanes project to avoid and minimize impacts to the environment.

What is the project timeline?

  • July 2003:  Environmental documentation began.
  • July 2003:  Five percent footprint design began.
  • June 2005:  Environmental scoping report released.
  • March 9, 2006: Environmental Assessment published.
  • Next steps: Purchase needed right of way and begin preliminary engineering.

Financial Information

The project is currently in the design phase, with potential funding from corridor project savings for preliminary engineering ($35 million) and right-of-way acquisition ($30 million). The construction phase ($825 million) is unfunded.

How can I get more information?
Steve Peer
I-405 Project Team Office
600 108th Avenue NE
Suite 405
Bellevue, WA  98004

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