When approaching a roundabout, you should __________.

When approaching a roundabout, the correct action is to yield to the traffic already in the roundabout. This rule ensures that vehicles circulating in the roundabout have the right of way, promoting smooth and safe flow of traffic. Yielding allows you to assess the situation and merge in a safe and orderly manner. It helps prevent collisions and ensures that all vehicles can navigate the roundabout without conflict.

In contrast, speeding up to merge quickly disrupts the flow and increases the risk of accidents, while stopping and waiting for a green light is not applicable, as roundabouts do not have traffic lights in most cases. Entering without yielding disregards the fundamental traffic rules necessary for safely navigating roundabouts, which can lead to dangerous situations. Understanding the importance of yielding in a roundabout is crucial for safe driving and maintaining efficient traffic flow.