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.

What to expect

Main Street bridge construction

The Main Street bridge across I-405 in downtown Bellevue was fully reopened vehicular traffic on Sunday, Jan. 29. Crews demolished the old Main Street Bridge in June 2022 and have been replacing the bridge to accommodate the future new lanes on I-405. For more information about this work, please read our blog.

 

Upcoming night work

Week of April 2 to April 8 

City of Renton 

• Saber Tech fiber pathway proofing between northbound State Route 167 and southbound I-405 (4 nights: April 3-6) 
• Remove rumble strips from roadway, repave and restripe, and install steel plate over electrical vault, along southbound I-405 between North Southport Drive and Sunset Boulevard (4 nights: April 3-4 and April 6-7) 
• Grind, remove rumble strips, and pave unraveling hot mix concrete along northbound I-405 between Northeast 44th Street and 112th Avenue Southeast (3 nights: April 4-6) 

City of Newcastle 

• Fill a pothole on the May Creek bridge (1 night: April 5)
• Grind and pave unraveling hot mix concrete on the southbound side of May Creek bridge (1 night: April 6) 
• Attenuator repair at milepost 8.4 (1 night: April 7)

City of Bellevue  

• Install underdeck utilities on the Main Street Bridge (2 nights: April 5-6) 

 

Week of April 9 to April 15 

City of Renton 

• Saber Tech fiber pathway proofing between northbound SR-167 and southbound I-405 (4 nights: April 10-13)  
• Set barrier and lower ITS (Intelligent Transportation System) vaults near the northbound I-405 on-ramp from Lake Washington Boulevard (5 nights: April 10-14) 
• Install temporary protective barrier on the southbound I-405 off-ramp to North Southport Drive (1 night: April 11)