A circular one-way road is a unique type of road system that is designed to allow traffic to flow in one direction only, while also connecting various points along the way. Synonyms for a circular one-way road include roundabout, rotary, traffic circle, gyratory, and circlet. Each of these terms refers to a road system that is circular in shape and directs traffic in a specific pattern. While these road systems can be confusing for some drivers, they are generally seen as an effective way to reduce accidents, improve traffic flow, and reduce congestion on busy city streets.