Which action is required when approaching a roundabout?

When approaching a roundabout, the essential action is to yield to traffic that is already circulating within the roundabout. This practice ensures a smooth and safe flow of traffic. Vehicles already in the roundabout have the right of way, and yielding prevents collisions and helps to maintain the momentum of traffic, which is crucial for the roundabout's design and functionality.

By yielding, you acknowledge the presence of other vehicles and give them the priority, which is critical for ensuring everyone’s safety and efficiency. Properly yielding prevents the need for abrupt stops and facilitates a smoother transition into the circular traffic flow. This understanding is fundamental for becoming a competent driver, especially in situations involving roundabouts, which are designed to reduce potential accident risks compared to traditional intersections.

In contrast, entering without stopping could lead to dangerous situations if you encounter vehicles already in the roundabout. Signaling left before entering is not necessary unless you plan to exit the roundabout at the next left turn, and speeding up to clear the roundabout quickly is unsafe as it can compromise reaction times and lead to accidents.