Rotaries are circular structures which are designed to simplify a traffic intersection. Synonyms for rotaries include roundabouts, traffic circles, and rotary junctions. Roundabouts are a common name in North America, whereas traffic circles are widely used in the United Kingdom. Other synonyms for rotaries include traffic ovals and road circles. These terms essentially refer to the same type of circular intersection. Rotaries are often used in urban areas to control the flow of traffic and minimize accidents. They are also a popular means of improving traffic safety in various countries. Whatever name they go by, rotaries remain a vital tool for traffic management in today's world.