Vehicles approaching a roundabout must:

In a roundabout, vehicles approaching must yield to the traffic that is already within the circle. This yielding is crucial to maintaining a smooth flow of traffic and avoiding collisions. The design of roundabouts is intended to minimize the number of conflict points between vehicles, thus enhancing safety. By yielding to the vehicles already circulating, drivers can ensure that they can merge into the roundabout without disrupting the ongoing traffic flow.

The incorrect options highlight common misconceptions about navigating roundabouts. Stopping for traffic lights is not applicable since roundabouts do not typically have traffic signals; they operate more effectively through the yielding process. Accelerating to merge would negate the yielding principle and could lead to dangerous situations if vehicles fail to accommodate one another. Ignoring other vehicles also contradicts safe driving practices, as awareness of surrounding traffic is essential for avoiding accidents. Overall, yielding is a fundamental rule of navigating roundabouts effectively and safely.