What should you do if you approach a roundabout?

When approaching a roundabout, the correct action is to yield to traffic already in the roundabout and enter when it's safe. This is essential because roundabouts are designed to facilitate a continuous flow of traffic. By yielding, drivers allow vehicles that are already circulating within the roundabout the right of way, ensuring that the intersection functions smoothly and minimizes the risk of collisions. This practice also enhances safety for pedestrians and cyclists who may be crossing at the entry points.

The other choices reflect common misconceptions about navigating roundabouts. Speeding up to merge can create dangerous situations and disrupt the flow of traffic. Stopping before entering may cause confusion and unintended delays, especially if there's no traffic already in the roundabout. Signaling right before entering is unnecessary; drivers should signal their intentions when exiting the roundabout instead, to inform others of their movements. Understanding the proper protocol for roundabouts helps maintain safety and efficiency on the road.