What is the main purpose of roundabouts in traffic management?

The main purpose of roundabouts in traffic management is to improve traffic flow and reduce accidents. Roundabouts are designed to facilitate continuous movement of vehicles, allowing them to merge smoothly without the need to come to a complete stop, as would be required at a traditional traffic signal or stop sign. This continuous flow minimizes delays and encourages more efficient use of road space.

Additionally, research shows that roundabouts can significantly lower the frequency and severity of accidents. By reducing the number of conflict points that vehicles encounter—compared to traditional intersections—roundabouts decrease the likelihood of high-speed collisions, which often result in serious injuries or fatalities. The design of roundabouts, which requires vehicles to navigate circular paths at lower speeds, also adds a layer of safety for pedestrians and cyclists.

Other options such as increasing speed limits or promoting vehicle speed contradict the primary safety intent of roundabouts, and eliminating traffic signals is not a primary purpose but rather a byproduct of their design in certain locations.