WSDOT added one northbound lane and one southbound lane to I-405 between I-5 and SR 167. We also added one southbound lane on SR 167 between I-405 and SW 41st Street, and extended the southbound SR 167 HOV lane from I-405 to the start of the HOT (High Occupancy Toll) lane.
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 was the first step as part of the broad master plan for I-405 improvements approved in 2002 by the cities and countries along the corridor, the Federal Highway Administration, Federal Transit Authority, Sound Transit, King County Metro and WSDOT.
Increased capacity improves safety by reducing congestion-related collisions.
The I-5 to SR 169 Stage 1 Widening project reduces congestion by increasing general purpose capacity.
| Protects Environment
WSDOT's I-405 Corridor Program team designed this project to avoid and minimize affects to the enviroment.
Partnerships & Cooperation
In 2005, the Washington State Legislature provided funding towards this project by passing the Transportation Partnership Funding Package.
This project did 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.
- Transportation 2003 Account (Nickel Funding) - $72.6 million
- 2005 Gas Tax (Partnership Funding) - $96.7 million
- Other funding - $226,000
- Total Funding From All Sources - $169.5 million
I-405 Corridor Program
600 - 108th Avenue NE
Bellevue, WA 98004
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