US 12 - Old Naches Highway - Build Interchange


Fall 2017

  • In order to balance the 2008 Supplemental Transportation Budget, the Washington State Legislature deferred further spending on this project out of the 16-year highway construction program.

Construction of a new interchange will remove the existing traffic signal, eliminate unexpected traffic stops, and reduce slowdowns on this 60 mph route. Intersection conflicts will be eliminated. Local cross traffic will have an interchange bridge across the four-lane highway.

Why is WSDOT building a new interchange?
US 12 is a major east-west transportation corridor, serving both regional and local traffic. Population growth and economic development in the Yakima area have caused increased traffic, collisions, and congestion at two existing intersections on US 12 west of Yakima. This project will reduce collisions and relieve congestion at the Old Naches Highway and Mitchell Drive intersections with US 12.

The End Result
The new interchange will provide safer traffic flow and eliminate conflicts between high speed traffic on US 12 and local cross traffic on Old Naches Highway. 

Project Benefits

  • Safety - A daily average of  6,000 vehicles access US 12 at the Old Naches Highway; we estimate as many as 10,000 vehicles a day will be accessing US 12 at this intersection by the year 2024. By constructing an interchange to replace the signalized at-grade intersection, we expect to greatly reduce rear-end collisions and other intersection-related crashes.
  • Congestion Relief - Currently, as many as 18,000 vehicles travel through this section of US 12 each day.  This number is estimated to rise to  27,000 vehicles a day by 2024.


What is the project timeline?
WSDOT continued preliminary design and environmental work through June 2009. Funding for further work has been deferred beyond 2023.

Financial Information

Financial Data for PIN 501208J
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $37,115
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $1,325
CWA $0
Total $38,440


How can I get more information?

Troy Suing
WSDOT Assistant Regional Administrator