This is the most basic interchange design, and it consists of four ramps (two off-ramps and two on-ramps). Diamond interchanges have a diamond shape when viewed from the air, hence the name. There are four ramps total in this configuration. Traffic exiting a freeway at a diamond interchange will see usually see a stop sign or traffic light to manage traffic leading onto the connecting road. More modern diamond interchanges incorporate roundabouts at the ramp ends. The type of roundabout gives the nickname of a dog bone or dumbbell interchange. See Kurumi’s Diamond Interchanges for more.