Alberta Motor Association (AMA) Learner’s Practice Exam

Roundabouts are designed to improve traffic management by facilitating a continuous flow of vehicles. Their circular design encourages drivers to yield to traffic already in the roundabout, which helps to minimize stopping and reduces the likelihood of congestion that often occurs at traditional intersections. This continuous movement not only enhances the efficiency of traffic flow but also contributes to safety.

Evidence suggests that roundabouts can lead to a significant reduction in the number and severity of accidents compared to standard intersections. The lower speeds that are typically maintained within a roundabout decrease the force of collisions when they do occur, often resulting in fewer severe injuries. Additionally, since vehicles do not have to stop and wait for lights or oncoming traffic, this configuration can decrease the likelihood of rear-end collisions.

In contrast, other options suggest negative or limited functions of roundabouts that do not align with their primary purpose in urban planning and traffic design. Their effectiveness in promoting smooth traffic flow and enhancing safety makes them a valuable feature in modern roadway systems.