This map shows the project limits for Stage 1 of the I-405, I-5 to SR 169 Project.
Crews opened a new lane in each direction on I-405 between I-5 and SR 167 on Dec. 11, 2009.
Crews realigned the Springbrook Trail to accommodate the new I-405 bridge over Oakesdale Avenue SW.
February 2010
We’ve received several comments about the new lane opening on southbound I-405 between SR 167 and I-5. While many drivers have told us traffic flow has really improved, they’ve also let us know they don’t like the signs or striping. So we are going to fix that as soon as we get some dry nights. Please check the WSDOT blog for updates.
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 start of the HOT (High Occupancy Toll) 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 in addressing 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. 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.
- Safety. Increased capacity improves safety by reducing congestion-related collisions.
- 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?
- October 2, 2006: The Renton Nickel Improvement Project EA is published.
- Fall 2007: Construction began.
- Spring 2010: Construction complete.
Financial Information
The information shown below reflects the current approved project budget and schedule.
- Transportation 2003 Account (Nickel Funding) - $72.6 million
- 2005 Gas Tax (Partnership Funding) - $96.7 million
In 2005, the Washington State Legislature provided funding towards this project by passing the Transportation Partnership Funding package.
- Other funding - $226,000
- Total Funding Available From All Sources - $169.5 million
How can I get more information?
Contact:
Steve Peer
I-405 Corridor Program
600 - 108th Avenue NE
Suite 405
Bellevue, WA 98004
425-456-8624
mailto:steve.peer@i405.wsdot.wa.gov
back to top