What action should a driver take when approaching a roundabout?

When approaching a roundabout, a driver should yield to traffic already in the roundabout. This is crucial because roundabouts are designed to keep traffic flowing smoothly and reduce the likelihood of collisions. Vehicles already circulating in the roundabout have the right of way, which helps maintain an orderly flow and prevents traffic from backing up.

Yielding allows drivers to assess the flow of traffic within the roundabout, ensuring that it's safe to enter without disrupting the movement of other vehicles. It also enhances safety by reducing potential conflicts between vehicles entering and exiting the roundabout.

It's essential for drivers to be aware of the merging dynamics in a roundabout. By yielding, a driver contributes to a safer and more efficient roadway experience for everyone involved. The other choices do not appropriately address the rules of engagement for roundabouts and could potentially lead to dangerous situations.