When approaching a roundabout, what should a driver do?

Answer: B — Yield to traffic already in the roundabout

When approaching a roundabout, the correct action for a driver is to yield to traffic already in the roundabout. This is crucial for maintaining safety and ensuring the smooth flow of traffic. Roundabouts are designed to allow vehicles already circulating within them the right of way, making it essential for incoming vehicles to assess the flow of traffic and merge safely. Yielding helps to prevent collisions and allows for a more efficient traffic pattern, reducing congestion and maximizing the effectiveness of the roundabout design. It is especially important to watch for vehicles coming from the left, as they will have the right of way in countries where traffic drives on the right side. While accelerating through the roundabout might seem like a way to maintain speed, it can lead to dangerous situations where drivers may not be aware of oncoming traffic. Stopping before entering isn’t necessary if there's no traffic, and it could disrupt the flow. Signaling left before entering is also not appropriate, as typically, a right turn signal is used when leaving the roundabout based on your exit. Thus, yielding to traffic is the safest and most appropriate action when approaching a roundabout.