• Project

I-405/Northeast 132nd Street Interchange Project

Project overview

We will construct a new on-ramp to northbound I-405 and a new off-ramp from southbound I-405 at Northeast 132nd Street in Kirkland. This type of interchange is known as a half-diamond. After this project is complete, travelers will have the option to access I-405 at Northeast 132nd Street, rather than traveling to the heavily congested Northeast 124th or 160th Street interchanges. The designs include roundabouts at the intersections of the new ramps and Northeast 132nd Street to better manage traffic flow and sidewalk and bicycle lane enhancements along both sides of Northeast 132nd Street in the project vicinity. The project also improves drainage, water quality and fish barrier correction to create over a half mile of new upstream fish habitat.

Timeline
We anticipate construction beginning in spring 2022 with the new interchange opening to traffic in 2024.
Project status
Pre-construction
Funding
$47.75 million (contractor’s bid amount)
Project hotline

What to expect

As part of preconstruction activities beginning in December and continuing into early 2022, travelers should expect temporary shoulder closures along I-405 and lane closures along Northeast 132nd Street, 116th Avenue Northeast, and Totem Lake Boulevard. Shoulder and lane closures will generally occur between 9 a.m. and 3 p.m. Expect to see construction crews, work signage, orange traffic barrels and flashing lights in the area of I-405/Northeast 132nd Street.

Preconstruction activities will typically include installing signage, clearing vegetation, surveying, and geotechnical boring/potholing. Closures are dependent on Traffic Control Plan approvals and may change. Dates and times listed are the earliest that closures would occur.

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. Nighttime and weekend full closure could be expected during construction with detour and potential delays. We will work to minimize inconveniences to motorists during highway and local roadway construction with up-to-date information about traffic and travel options.

The project includes roundabouts at the intersections of the new ramps and Northeast 132nd Street.