What should a driver do when approaching a roundabout?

When approaching a roundabout, it is essential for a driver to yield to the traffic that is already in the roundabout. This is because the vehicles within the roundabout have the right of way, and yielding ensures a smooth flow of traffic and prevents potential collisions.

By yielding, drivers can assess the situation within the roundabout, allowing them to safely merge when there is a gap in traffic. This practice is crucial for maintaining order and efficiency in the roundabout, which is designed to facilitate easier navigation at intersections.

The other choices can lead to unsafe driving practices. For example, speeding up to merge quickly can create unpredictable and dangerous situations, while stopping before entering the roundabout may cause unnecessary delays and confusion as drivers behind may not expect a sudden stop. Additionally, failing to signal when entering the roundabout can lead to a lack of communication with other drivers, increasing the risk of accidents. Thus, yielding to traffic already in the roundabout is the appropriate action for ensuring safety and efficient traffic movement.