Who has the right-of-way in a roundabout?

In a roundabout, traffic that is already within the roundabout has the right-of-way. This design helps maintain a continuous flow of traffic and reduces the likelihood of collisions. Vehicles entering the roundabout must yield to those already in the circle, allowing for smoother navigation and minimizing delays. This rule is essential for the safety of all road users, as it helps prevent confusion and ensures a clear understanding of who must stop or proceed.

The other options present scenarios that do not align with this fundamental rule of roundabout traffic management. Vehicles entering the roundabout need to yield as part of the established traffic flow. Emergency vehicles have specific guidelines they follow and typically operate under established protocols rather than general right-of-way rules. Additionally, while pedestrians do have rights, they are often required to wait for a safe opportunity to cross at designated points, especially in the context of roundabouts where vehicles are moving.