What must you do when approaching a roundabout?

When approaching a roundabout, it is essential to yield to traffic already in the roundabout. This rule is designed to ensure a smooth flow of traffic and enhance safety. Vehicles already circulating have the right of way, and yielding helps to prevent collisions and allows for a more efficient transition into the roundabout.

The design of roundabouts aims to reduce the number of conflict points compared to traditional intersections, making yielding crucial for maintaining traffic flow. Drivers should slow down as they approach the roundabout, assess the traffic already in the roundabout, and only proceed when it is safe to do so. This practice not only keeps the roundabout operational but also minimizes the risk of accidents.

Other options, such as speeding up to enter first, turning left to navigate the roundabout incorrectly, or stopping for a signal, contradict the fundamental rules of right-of-way and the intended traffic flow design of roundabouts. Understanding this yielding principle is vital for safe and effective driving around this type of traffic feature.