What action should a driver take when approaching a roundabout?

When approaching a roundabout, the appropriate action is to yield to traffic that is already within the roundabout. This is crucial for ensuring smooth traffic flow and safety. By yielding, you allow vehicles in the roundabout to pass, which helps prevent accidents and reduces congestion.

Entering a roundabout involves carefully assessing your surroundings and giving way to vehicles that have the right of way. This practice facilitates a continuous movement of traffic and minimizes the likelihood of collisions, as drivers can merge into the roundabout only when it is safe to do so.

On the other hand, actions such as speeding up to enter quickly can create dangerous situations, as it disregards the need to yield to existing traffic. Making a U-turn in a roundabout is typically not permitted and can confuse other drivers. Lastly, restricting oneself to the left lane isn't advisable without reason, as different lanes in a roundabout may have designated exits; therefore, lane choice should be based on the intended direction of travel rather than a blanket choice of the left lane for all situations.