When approaching a roundabout, what is the correct action to take?

Yielding to traffic already in the roundabout is the correct action to take when approaching a roundabout because it ensures a smooth flow of traffic and enhances safety for all road users. Roundabouts are designed to maintain continuous movement, and vehicles already in the roundabout have the right of way. By yielding, drivers can assess the situation inside the roundabout and safely merge into the flow of traffic without causing disruptions.

This approach minimizes the risk of collisions since vehicles entering the roundabout are required to watch for those already circulating within it. Thus, proper yielding establishes a predictable pattern for all drivers, facilitating easier navigation and reducing the potential for accidents.

In contrast, speeding up to enter quickly can lead to unsafe situations, as it may cause confusion and make it difficult to gauge the speed of oncoming traffic inside the roundabout. Making a U-turn before entering is not a viable option because it doesn't comply with the intended use of a roundabout and can lead to dangerous maneuvers. Finally, stopping for all vehicles in the roundabout is impractical, as it can cause significant delays and hinder the smooth operation of the roundabout, which is designed for continuous traffic flow.