Main Street Bridge. Courtesy of WSDOT.

Main Street Bridge. Courtesy of WSDOT.

Full closure of I-405 set for Father’s Day weekend in Bellevue

Signs with detour routes will be available; closure will take place from June 17-20 to demolish Main Street Bridge.

The Washington Department of Transportation (WSDOT) is conducting major reconstruction of I-405 from Bellevue to Renton, with major closures expected this Father’s Day weekend.

Construction began in the fall 2020 to widen I-405 by adding one lane in each direction and to create a dual express toll system, similar to the one currently in place when traveling from Bellevue to Bothell, according to WSDOT.

“Right now that area basically from I-90 all the way down to Renton (SR) 167 is about one of the worst routes in the region,” said Craig Smiley, construction manager for WSDOT.

According to Smiley, about 190,000 vehicles travel that route on Saturdays, while about 160,000 vehicles take that route on Sundays.

With the addition of new lanes as well as 50 miles of a managed lane system, individuals can expect considerable improvements in the traffic flow. The managed lane system will allow drivers to pay for consistent and reliable trips while supporting rapid transit and carpooling, said Smiley.

As part of the reconstruction process, the Main Street Bridge in Bellevue closed on Monday, June 13, and will be closed continuously for a 150-day period.

“The new bridge will have the same configuration as the existing,” said Sharif Shaklawun, project engineer for WSDOT, who mentioned how there will be two lanes going in each direction on the new bridge.

Additional Main Street Bridge improvements include widening the sidewalk and bike path. Smiley described the current bike and pedestrian lanes as being “functionally nonexistent,” with the current sidewalk on the south side being 4 feet wide, while the north side offers about a 2-foot buffer.

While the bridge is under construction, the north sidewalk will experience an increase to 8 feet wide, while the south side will have a 12-foot-wide path, according. WSDOT expects the lane widenings to be an improved user experience for individuals who travel by walking and wheeling.

“We understand that construction is super impactful,” said Smiley. “We really ask if people can take public transit or carpool, and travel during off peak hours.”

Alternate routes

WSDOT encourages individuals to use alternative routes.

At 10 p.m. June 17, a full highway closure will take place in order to safely demolish the existing bridge. I-405 between Northeast 4th Street and Southeast 8th Street will be closed until 5 a.m. June 20.

Signs with detour routes will be available for drivers, pedestrians and bicyclists, and congestion throughout detour routes should be expected. For the five-month closure period of the Main Street Bridge, commuters can use alternative routes on Northeast 4th Street, Southeast 8th Street and Northeast 8th Street, which will relieve traffic congestion from Northeast 4th Street.

A map of detours commuters can take during the Main Street Bridge demolition. Courtesy of WSDOT.

A map of detours commuters can take during the Main Street Bridge demolition. Courtesy of WSDOT.

WSDOT suggests that those who are driving southbound I-405 use the Northeast 4th Street exit and travel south on 112th Avenue Northeast, where they can re-enter the highway at Southeast 8th Street. For those who are traveling northbound, WSDOT suggests using the Southeast 8th Street exit and traveling north on 116th Avenue to re-enter the highway through Northeast 4th Street.

The entirety of the I-405 reconstruction is expected to last until 2024. WSDOT has seen challenges regarding the COVID-19 pandemic and material supply issues, and more recently a concrete strike, which could affect the project in the long-term, Smiley said.

“Right now in the morning I probably send 30-40 minutes sitting in traffic,” said Smiley. “I’m looking forward to having a significantly improved commute when the project opens.”

For additional information on the I-405 project, click here.

In consideration of how we voice our opinions in the modern world, we’ve closed comments on our websites. We value the opinions of our readers and we encourage you to keep the conversation going.

Please feel free to share your story tips by emailing

To share your opinion for publication, submit a letter through our website Include your name, address and daytime phone number. (We’ll only publish your name and hometown.) We reserve the right to edit letters, but if you keep yours to 300 words or less, we won’t ask you to shorten it.

More in News

File Photo
Data released on fireworks-related injuries in Washington

Last year fireworks caused $122,000 in damage.

Photos of the damage to church property (Screenshot from Bellevue Police Department Twitter)
Bellevue resident charged with hate crime after vandalizing church

The defendent allegedly smashed glass and spray painted dozens of pointed remarks around the church.

Dr. Faisal Khan. Courtesy of King County.
Dr. Faisal Khan appointed as next King County health director

Dennis Worsham will continue to serve as interim director until September 6.

Log Boom Park. Courtesy of the City of Kenmore.
Log Boom Park reopens to public with new improvements

A ribbon cutting ceremony will be held on August 9 at 6 p.m.

King County experts discuss extreme heat mitigation plan

The plan includes improving infrastructure and communications to prevent future disasters.

Courtesy of the City of Kenmore.
City of Kenmore takes action to create 100 units of affordable housing downtown

Construction will begin midway through 2023, with a planned opening set for December of 2024.

King County Prosecuting Attorney Dan Satterburg (File Photo)
King County Prosecuting Attorney vows to protect reproductive freedom

Dan Satterberg joins over 80 prosecutors from around the country in their pledge.

King County approves emergency grant after U.S. Supreme Court overturns Roe v. Wade

Washington is expecting an influx of people seeking abortions from out of state.

Most Read