When is it mandatory to signal while driving?

Answer: B — Whenever changing lanes or turning

Signaling is a fundamental aspect of safe driving and communication with other road users. It is mandatory to signal whenever changing lanes or turning because it helps to inform other drivers and pedestrians of your intentions. This practice enhances road safety by reducing the risk of accidents that could occur if other road users are not aware of your movements. Proper signaling allows other drivers to anticipate your actions, creating a more predictable traffic flow. For example, signaling before a lane change gives adjacent drivers the opportunity to adjust their speed or position accordingly. Similarly, using turn signals when preparing to turn informs oncoming traffic and pedestrians, which is crucial for avoiding collisions. By adhering to this requirement, drivers contribute to a safer driving environment for everyone on the road. This obligation to signal is part of defensive driving practices, emphasizing the importance of communication in maintaining safety.