• Project

I-405/Renton to Bellevue Widening and Express Toll Lanes Project

Project overview

Travelers on Interstate 405 between Renton and Bellevue experience one of the state’s worst commutes. The I-405 Renton to Bellevue Widening and Express Toll Lanes project includes multimodal transportation and safety improvements to offer more reliable travel choices and keep drivers, transit riders and freight moving.

The Renton to Bellevue project will add new capacity to create a two-lane ETL system between SR 167 in Renton and Northeast Sixth Street in Bellevue. In general, the project will add one new lane in each direction and combine the existing HOV lane with the new lane to create a dual ETL system.

The new ETLs will connect to the existing express toll lane system between Bellevue and Lynnwood, as well as the SR 167 HOT lanes via the I-405/SR 167 Interchange Direct Connector, to create a 40-mile ETL system. This project is designed to improve speeds and trip reliability for all travelers and support the new I-405 Bus Rapid Transit (BRT) line between Lynnwood and Tukwila included in the voter-approved Sound Transit 3 package.

2015 - 2025
Project status
$705 million (contractor’s bid amount)
Project hotline

What to expect

Upcoming night work

Week of May 26 – June 1 

City of Bellevue: 

  • Drainage installation for the fish passage near Coal Creek Parkway Southeast (1 night: 5/31) 
  • Bore installation and overhear sign removal work for bridge 40E (4 nights: 5/28-5/31) 
  • Permanent striping on Main Street (4 nights: 5/28-5/31) 

City of Renton: 

  • Saber fiber distribution work near Talbot Road South (4 nights: 5/28-5/31) 
  • Shotcrete facing, test proof nails, bench and wall excavation, and soil and proof nail installation for wall 3.30R near the Cedar River (5 nights: 5/28-6/1) 
  • Slope excavation for wall 6.50R near Northeast Sunset Boulevard (4 nights: 5/28-5/31) 
  • Slope excavation and barrier demolition for wall 7.90R-A(2) near Gypsy Creek (3 nights: 5/30-6/1) 

Project improvements will occur in the Renton to Bellevue area along I-405.