What is the purpose of a roundabout?

Answer: B — To improve traffic flow and reduce accidents

The purpose of a roundabout is primarily to improve traffic flow and reduce accidents. Roundabouts are designed to keep traffic moving smoothly by allowing vehicles to circulate in one direction rather than having to stop at traffic signals or stop signs. This design minimizes points of conflict between vehicles, which helps to decrease the likelihood of accidents. Furthermore, by managing the traffic in a circular manner, roundabouts reduce the need for vehicles to come to a complete stop, thereby lowering the chance of rear-end collisions and making the road safer for all users, including pedestrians and cyclists. The continuous flow of traffic helps in reducing congestion, making it an effective solution for improving overall traffic conditions.