What should a driver do when approaching a roundabout?

When approaching a roundabout, the driver should yield to traffic already in the roundabout. This is crucial for maintaining a smooth flow of traffic and preventing collisions. Traffic within the roundabout has the right-of-way, and by yielding, the driver allows vehicles already circulating to pass safely, ensuring that the entry into the roundabout is both controlled and safe. This practice also helps to minimize congestion and allows for efficient movement through the roundabout.

Other actions such as accelerating quickly to enter or stopping before entering are not advisable. Rapid acceleration can create safety hazards, and stopping can disrupt the traffic flow. While using a turn signal to indicate direction is important when exiting a roundabout, it does not take precedence over yielding to traffic that is already in the roundabout. Thus, prioritizing yielding is essential for safe and effective navigation through roundabouts.