The Washington State Department of Transportation (WSDOT) has announced a planned weekend closure of Interstate 405 (I-405) as part of the ongoing I-405 Renton to Bellevue Widening and Express Toll Lanes Project. This closure is necessary to facilitate critical construction activities and ensure the safety of both the workers and the traveling public.

Closure Details

• Dates: Friday 11:00 p.m., July 12 through Monday 4:00 a.m., July 15
• Location: I-405 will be closed from Exit 5 (SR-900) to Exit 10 (Coal Creek Pkwy)

Detour Information

During the closure, traffic will be detoured onto Coal Creek Parkway and SR-900/Sunset Blvd. Please refer to the detour map for detailed routing information.

Why the Closure?

This closure is part of the broader effort to widen I-405 and introduce express toll lanes, which will help to alleviate congestion and improve traffic flow in one of the busiest corridors in the region. The work scheduled for this weekend is critical for the next phase of the project.

What to Expect

• Increased Traffic on Detour Routes: Expect higher traffic volumes on Coal Creek Parkway and SR-900/Sunset Blvd.
• Possible Delays: Plan for additional travel time and consider alternate routes if possible.

Stay Informed

We encourage all motorists to stay informed about the closure and detour by following WSDOT social media channels and checking the WSDOT project website for updates as the date approaches.