I-405 - NE 132nd St. Interchange Improvements - Project designs

The proposed interchange design includes roundabouts at the intersections of the new ramps with Northeast 132nd Street. Because of their ability to better manage traffic flow, roundabouts require fewer approaching lanes than a signalized intersection would. This smaller footprint minimizes the impact to nearby property owners while efficiently handling greater volumes of traffic.

I-405 crosses over Northeast 132nd Street on a structure elevated over the local street. The drawing below shows the proposed configuration of Northeast 132nd Street under the existing structures.

Overhead image of I-405/Northeast 132nd Street interchange design
 

Image of I-405 structure over Northeast 132nd Street