I-5 - 179th St. Interchange - Interchange Improvements - Interchange Design Concepts

I-5/179th Street - Interchange - Interchange Improvements - Diverging Diamond Interchange design

The diverging diamond interchange or DDI, design concept would improve safety and mobility along Northeast 179th Street. This interchange is a type of diamond interchange in which the two directions of traffic on the non-freeway road cross to the opposite side on both sides of the bridge at the freeway. To see how a DDI interchange works, click here.
 

I-5/179th Street - Interchange - Interchange Improvements - Single Point Urban Interchange design

The single point urban interchange or SPUI, design concept would move large volumes of traffic through limited amounts of space safely and efficiently along the Northeast 179th Street corridor, with the use a single, signalized intersection.
To see how a SPUI interchange works, click here.
 

I-5/179th Street - Interchange - Interchange Improvements - Roundabout interchange design

The roundabout interchange or RR, design concept would improve safety and mobility along Northeast 179th Street, by controlling access to and from the highway, onto arterial roads without the use of signals.
To learn more about roundabouts, click here.