What must you do when leaving a roundabout?

When leaving a roundabout, signaling right is crucial because it informs other road users of your intention to exit. This communication helps prevent confusion and ensures smoother traffic flow, reducing the risk of accidents. Signaling right clearly indicates that you are about to leave the roundabout, enabling drivers who may be entering the roundabout or those already in it to anticipate your movement and adjust accordingly.

The other options do not adequately reflect the correct traffic behavior associated with exiting a roundabout. For instance, signaling left could give the impression that you intend to go around again, which can mislead other drivers. Not signaling at all fails to provide any indication of your intentions, which is essential for maintaining safety and clarity on the road. Using your horn is unnecessary in this context and can be seen as aggressive or distracting, rather than a constructive method of communication in traffic. Thus, signaling right ensures you comply with the rules of the road while enhancing safety for yourself and other road users.