Click here for a full-size image

     Click here for a full-size image

     Click here to see Vissim Simulation
     (double speed, 23MB)

     Click here for a full-size image

     Click here to see Vissim Simulation
     (double speed, 15MB)

What is a Diverging Diamond Interchange?

The diverging diamond interchange (DDI) is a type of freeway interchange, consisting of one intersection at each freeway of-ramp. It is regarded as an innovative intersection design as a way to increase capacity, decrease congestion and minimize the cost of new infrastructure. 

The diverging diamond interchange allows free left turns for motorists, meaning vehicles don’t cross opposing traffic. Traffic models indicate this type of interchange works well with areas of heavy traffic as demonstrated with the above two video clips of preliminary traffic simulation.

For more information, please contact Wes Guckert at wguckert@trafficgroup.com.