Under what conditions must you use your turn signals?

Using your turn signals is essential for ensuring safety and effective communication with other road users. The correct answer indicates that you must signal when changing lanes or making a turn. This is important as it alerts other drivers and pedestrians to your intentions, allowing them to react appropriately and maintain safe distances.

Turn signals help to prevent accidents by providing a clear indication of your next move, facilitating smoother traffic flow. Using a turn signal when changing lanes or turning allows other drivers to anticipate your actions and adjust their driving accordingly. Failing to signal in these situations can lead to confusion and increase the risk of collisions.

The other options suggest conditions that do not encompass the full responsibility of using turn signals. For instance, signaling only at intersections or relying solely on signage would not effectively communicate lane changes or turns to others. Additionally, the notion that turn signals are only necessary when driving above a certain speed is misleading, as the need for signaling is constant regardless of speed.