ATTAP

Select an Unconventional Intersection Type:

Grade-Separated & Unsignalized

Single Roundabout Interchange

Design Description

Free-flow arterial thru movements are provided by using a roundabout on a separate grade to accommodate arterial left and right turns and all movements on the cross street. In most cases the arterial is depressed and passes underneath the roundabout, and the ramps serve as frontage roads approaching the intersection.