What vehicle should give way when a roundabout is present?

When navigating a roundabout, the key rule is that vehicles already in the roundabout have the right of way. This is designed to maintain smooth traffic flow and reduce the likelihood of collisions. By giving priority to vehicles that are already circulating within the roundabout, it minimizes the need for sudden stops or merges, enhancing safety for all road users.

In contrast, vehicles entering the roundabout must yield to those already within it. This helps prevent congestion and confusion that can occur if multiple vehicles attempt to enter the roundabout at the same time without adhering to the right-of-way rules.

Emergency vehicles, while typically given priority in many driving situations, do not change the fundamental right-of-way rules for roundabouts. Instead, drivers should always yield to emergency vehicles regardless of their location within or approaching the roundabout.

Ultimately, understanding this right-of-way rule is crucial for safe and efficient driving in roundabouts.