A circular one way road is a road that only goes in one direction in a circular path. There are several synonyms for this type of road, including roundabout, traffic circle, rotary, and carrousel. In some countries, it may also be known as a gyratory or a circulatory. Roundabouts are becoming increasingly popular in urban areas because they reduce traffic congestion and accidents compared to traditional intersections. They also provide a more attractive landscaped feature than traditional crossroads. In addition, they can be used instead of traffic lights because they slow traffic down without the risk of rear-end collisions.