This map shows the project limits for Stage 1 of the I-405, I-5 to SR 169 Project.
Project Facts
- Adds one general purpose lane in each direction on I-405 from SR 167 to I-5.
- Adds an auxiliary lane on southbound SR 167 between I-405 and SW 41st Street and extends the SR 167 SB HOV lane north to I-405
- Replaces the I-405 bridges over Springbrook Creek and Oakesdale Avenue and rehabilitates multiple ramp connections at SR 167 and SR 181
Overview
WSDOT will add one northbound and one southbound lane to I-405 between I-5 and SR 167. We will also add one southbound lane on SR 167 between I-405 and SW 41st Street, and extend the southbound SR 167 HOV lane from I-405 to the existing start of the HOV lane.
Why is WSDOT
constructing these new lanes?
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 is a first step to address the congestion at this critical interchange. The I-405/ I-5 to SR 169 Stage 1 Widening Project is part of a broad master plan for I-405 improvements 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.
The master plan 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
As the first stage in a long range plan, this project will reduce the congestion on and increase the capacity of I-405 between I-5 and SR 167. The additional lanes on I-405 will increase the I-405 general purpose roadway capacity by fifty percent. Interchange improvements will also relieve congestion.
Project Benefits
- Congestion relief. The I-5 to SR 169 Stage 1 Widening Project reduces congestion by increasing general purpose capacity 50% between I-5 and SR 167.
- Safety. Increased capacity improves safety by reducing congestion-related accidents.
- Environment. WSDOT's I-405 Corridor Program team is designing the project to avoid and minimize affects to the environment.
What is the project timeline?
- The Renton Nickel Improvement Project EA was published on October 2, 2006.
- Stage 1 construction began in 2007 and will open to traffic in 2010.
Public Involvement
Your thoughts and opinions are important to us. In addition to working closely with community councils and other local groups, the project team offers opportunities for public information and discussion. Please send the team an e-mail if you would like to be added to the project mailing list. You will be kept posted via e-mail on the project’s status and on further participation opportunities as the project progresses. Also, feel free to check this regularly updated web page for information. If you have comments or feedback please e-mail the public information department for the I-405 Corridor Program at craig.kanaya@i405.wsdot.wa.gov.
Environmental Protection
WSDOT's I-405 Corridor Program team completed the Environmental Assessments (EA) for the Renton Nickel Improvement Project which identify the project effects and mitigation opportunities, and cover up to 20 different disciplines, such as noise, air quality, fish and wildlife, wetlands, and parks and recreation. Throughout the process to complete the EA, the I-405 Project Team is designed the project to avoid or minimize effects to the environment whenever possible. The I-405 projects include elements that improve the environment for people, wildlife, and habitat such as improved water quality, and restored and enhanced stream and wetland habitat.
Please visit the WSDOT Environmental
Services Web site for more information.
Increasing safety is one of our priorities
This project reduces congestion-related accidents by increasing capacity on north and southbound I-405. Congestion-related accidents - rear-end and side-swipe crashes - make up the largest percentage of accidents on I-405.
Will this project impact tribal resources?
This project will not affect tribal reservations lands. The I-405 Corridor Program works closely with tribes throughout the environmental process to ensure that the project avoids or minimizes any effects on archaeological sites, tribal traditional cultural properties, and natural resources. WSDOT will follow an Unanticipated Discovery Plan if unknown archaeological materials are encountered during construction.
At WSDOT we seek to address the concerns of the Tribes by using the process outlined in the WSDOT Tribal Consultation Policy adopted in 2003 by the Washington Transportation Commission as part of the WSDOT Centennial Accord Plan and Section 106 of The National Historic Preservation Act (NHPA).
The NHPA was enacted to address the publics concern that many of the nation's historic resources were being overlooked in the public works project process. NHPA Section 106 requires government agencies such as WSDOT to evaluate the impact of all government-funded construction projects. Under the act, agencies maintain their own preservation program, and are required to incorporate advice from historic preservation professionals.
For more information, visit our WSDOT Tribal Liaison Web page.
Financial Information
- Transportation 2003 Account (Nickel funding) - $126 million
- 2005 Gas Tax (Partnership Funding) - $37 million
In 2005, the Washington State Legislature provided funding towards this project by passing the Transportation Partnership Funding package.
- Total Funding Available From All Sources - $163 million
How can I get more information?
Contact:
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