What is the main purpose of a roundabout?

The main purpose of a roundabout is to allow for continuous traffic flow. Roundabouts are designed to improve the efficiency of intersections by reducing the number of stops that vehicles need to make. In a roundabout, vehicles yield upon entering and then proceed to circulate smoothly around a central island. This design minimizes the need for traffic signals and stop signs, which can create delays and increase congestion at traditional intersections.

Additionally, because roundabouts promote a continuous movement of vehicles, they also enhance safety by reducing the potential for high-speed collisions that are common at typical intersections. By channeling traffic in a circular motion, roundabouts can help manage heavy traffic volumes effectively, thus optimizing the overall flow on roadways.