This map shows the vicinity of the Tukwila to Renton Improvement Project.
Current view of the I-405 / SR 167 Interchange.
Get more information about the proposed I-405 / SR 167 Interchange improvements on our project page.
- The Notice of Availability for the Finding of No Significant Impact (FONSI) for the Tukwila to Renton Improvement Project was published on July 23, 2008.
- WSDOT published the Tukwila to Renton Improvement Project Environmental Assessment (EA) on April 4, 2008.
The Tukwila to Renton Improvement Project is the second phase of improvements on I-405 between I-5 in Tukwila and SR 169 (Maple Valley Highway). The first phase of improvements on I-405 in this area is the Renton Nickel Improvement Project (I-5 to SR 169).
In addition to the improvements included in the Renton Nickel Improvement Project (I-5 to SR 169), the Tukwila to Renton Improvement Project includes adding one lane in each direction on I-405 between SR 181 and SR 167, two lanes in each direction on I-405 between SR 167 and SR 169, and one lane on northbound SR 167 from South 180th Street to I-405. The Tukwila to Renton Project also reconfigures the SR 181 and SR 167 interchanges, including improving High Occupancy Vehicle (HOV) connections between SR 167 and I-405.
A portion of the Tukwila to Renton Improvement Project, the SR 515 (Talbot Road) Interchange improvement, was funded for construction by the 2005 Washington State Legislature and completed in 2010. The SR 515 Interchange Project, located between SR 167 and SR 169, was the first step to reconfigure the SR 167 interchange. Additional funding is required to complete the entire Tukwila to Renton Improvement Project, including the SR 167 interchange.
Why is WSDOT
improving I-405 in Tukwila and Renton?
High volumes of commuters travel through this area, making the I-405 / SR 167 interchange one of the most congested in the state. This project addresses the congestion at this critical interchange. The Tukwila to Renton Improvement Project is part of a broad master plan (pdf 260 kb) approved in 2002 by the cities and counties along the corridor, the Federal Highway Administration, Federal Transit Authority, Sound Transit, King County Metro and WSDOT. This vision includes four new freeway lanes, bus rapid transit and other improved transit services, additional HOV direct access points, vanpools, carpool lanes and more park-and-ride spaces.
The End Result
The Tukwila to Renton Improvement Project will reduce congestion in the Tukwila and Renton areas. Completion of the project will allow for better connectivity between SR 167 and I-405.
- Safety. The two reconfigured interchanges provide enhanced access to Renton from I-405, resulting in reduced congestion-related collisions on I-405.
- Congestion relief. The new and reconfigured interchanges reduce congestion on I-405 at the SR 167, SR 515, and SR 181 interchanges. The additional lane capacity of the project also reduces congestion.
- Environment. WSDOT's I-405 Corridor Program team is designing the project to avoid and minimize impacts to the environment.
What is the project timeline?
- May 2006: The environmental process began.
- May 23, 2006: The Design Refinement and Scoping Meeting is held.
- April 4, 2008: Environmental Assessment (EA) is published.
- July 23, 2008: Finding of No Significant Impact (FONSI) is published.
- 2005 Gas Tax (Partnership Funding) - $114 million - In 2005, the Washington State Legislature provided $110 million towards this project by passing the Transportation Partnership Funding package.
- Total Funding Available From All Sources - $114 million (Additional funding required to complete entire Tukwila to Renton Project)
- On November 6, 2007 voters rejected Proposition 1, the Roads and Transit investment package, which would have provided the funds necessary to complete one area of this project.
How can I get more information?
I-405 Project Team Office
The Washington State Department of Transportation is a public agency and is subject to the State of Washington’s Public Records Act (RCW 42.56). Therefore, public comments and questions may be made available to anyone requesting them for non-commercial purposes.
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