What must a driver do when entering a roundabout?

When entering a roundabout, a driver must yield to traffic that is already in the roundabout. This is crucial because vehicles already circulating have the right of way. Yielding allows for a smoother flow of traffic and helps prevent collisions at this potentially complex roadway feature.

By yielding, drivers can assess incoming traffic and safely merge into the roundabout without disrupting the vehicles that are already in motion. This practice enhances safety and ensures that the flow of traffic remains efficient, as roundabouts are designed to facilitate continuous movement with fewer stops compared to traditional intersections.

Options that suggest signaling to turn left or stopping completely before entering the roundabout do not align with the primary objective of yielding to oncoming traffic. Similarly, speeding through without stopping neglects the essential requirement to give way, which could lead to dangerous situations and traffic accidents.