When approaching a roundabout, what is the priority rule?

The priority rule when approaching a roundabout indicates that traffic already circulating within the roundabout has the right of way. This is a fundamental traffic regulation designed to ensure smooth and safe flow within the roundabout, minimizing congestion and the likelihood of collisions. By yielding to vehicles already in the roundabout, drivers help maintain an efficient traffic pattern, as the circular design of the roundabout is intended to allow for continuous movement without the need for complete stops.

Understanding this rule is crucial for drivers to navigate roundabouts effectively. It helps to clarify the expectations for all drivers and contributes to overall road safety. The other options, while possibly addressing different aspects of road usage, do not reflect the specific priority rule that governs how vehicles interact within a roundabout setting. For instance, while vehicles entering the roundabout must indeed be mindful of pedestrians, this is not the primary priority rule for navigating the roundabout itself. Similarly, the priority of cyclists over vehicles and the suggestion that all vehicles must stop do not align with the common practices observed in roundabouts.