What should a driver do when approaching a roundabout?

When approaching a roundabout, yielding to traffic that is already in the roundabout is essential for ensuring safe and smooth traffic flow. This practice helps prevent collisions and allows drivers who are already within the roundabout to proceed without interruption. Roundabouts are designed to facilitate continuous movement, and yielding at the entry point minimizes the potential for conflict between vehicles.

This means that drivers should slow down as they approach and be prepared to stop if necessary, ensuring that they give way to any vehicles or pedestrians already circulating in the roundabout. This also contributes to overall traffic management and efficiency, as vehicles can merge seamlessly rather than causing disruptive stops and starts.

The other choices do not align with safe driving practices at roundabouts. Entering at a high speed can lead to loss of control and difficulties in adjusting to the presence of other vehicles. Always turning left does not apply unless the driver intends to make a left exit, and signaling left throughout the roundabout can confuse other drivers, as it may imply that the driver intends to continue moving in a circular direction rather than exiting.