What action should you take when approaching a roundabout?

Answer: B — Give way to vehicles already in the roundabout

When approaching a roundabout, the correct action is to give way to vehicles already in the roundabout. This practice helps maintain safe and efficient flow of traffic. Vehicles within the roundabout have the right of way, which ensures that they can continue circulating without unnecessary interruptions or collisions. By yielding to these vehicles, you allow for smoother transitions and reduce the likelihood of accidents. The principle is grounded in the design of roundabouts, where the intent is to keep traffic moving. It is crucial to assess the situation and only proceed into the roundabout when it is safe to do so. Adhering to this rule creates predictability for all road users, including both drivers and pedestrians. In contrast, other options might suggest inappropriate actions that could lead to confusion or hazards. For instance, speeding up to merge with traffic can introduce risk, as it may lead to aggressive maneuvers that endanger both yourself and others. Similarly, waiting for a traffic light is unnecessary in a roundabout setting, as they typically operate without signals to facilitate continuous flow. Finally, signaling to enter without regard for existing traffic can create dangerous situations, as other drivers may not anticipate your movements and can lead to collisions.