• Project

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

There will be night work in Renton and Bellevue as part of this project the week of November 22 – 28 and November 29 – December 5. For specific details about the work, you can view the what to expect section below. 

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.

Timeline
Construction began in 2020 and we anticipate opening to traffic in 2024.
Project status
Construction
Funding
$705 million (contractor’s bid amount)
Project hotline

What to expect

During construction, traffic conditions are expected to remain similar to existing conditions during the most congested times of the day, although some short-term delays may occur. Temporary closures would be required to widen the freeway, but they would occur on nights and weekends when traffic demand is lower and detour routes can better accommodate additional vehicles. Increases in vehicle delay would occur through construction areas and along detour routes. Construction is not expected to affect tolling operations. We will work to minimize inconveniences to motorists during highway construction with up-to-date information about traffic and travel options.

Week of November 22 – 28 

City of Renton

  • Potholing on the highway near Cedar River Bridge. (1 night)
  • Guardrail and sign repairs along the project corridor. (2 nights)
  • Concrete barrier realignment south of the Newport Hills Park & Ride and near exits 4 to 5 in Renton. (1 night)

City of Bellevue

  • Lane restriping along I-405 south of the Newport Hills Park & Ride. (2 nights)
  • Digging test pits along the project corridor in Bellevue. (1 night)
  • Guardrail and sign repairs along the project corridor. (2 nights)

Week of November 29 – December 5 

City of Renton

  • Lane restriping along the project corridor. (5 nights)

City of Bellevue

  • Temporary attenuator installation along I-405 south of the Newport Hills Park & Ride. (2 nights)
  • Lane restriping along the project corridor. (5 nights)

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