What should you do if you encounter a roundabout?

When you encounter a roundabout, yielding to traffic already in the roundabout is essential for ensuring safety and smooth traffic flow. Vehicles inside the roundabout have the right of way, which means you must give them priority before entering. This helps to prevent collisions and maintains an orderly flow of traffic, as vehicles can circulate without unnecessary interruptions.

In a roundabout, it's designed to promote continuous movement, making it crucial for drivers to be aware of their surroundings and adjust their speed accordingly when approaching it. Yielding allows you to assess the gap in traffic before entering, rather than rushing in or forcing your way in, which can lead to accidents.

The other choices present actions that do not align with safe driving practices in a roundabout. Speeding up to enter can create dangerous situations, turning on headlights is generally unnecessary during the day and does not address the need to yield, and signaling a right turn to exit immediately can confuse other drivers about your intentions at the entry point. By yielding, you contribute to a safer driving environment for all road users.