Why is a signal required when operating a vehicle?

A signal is required when operating a vehicle to communicate your intentions to other road users, including drivers, pedestrians, and cyclists. When you use signals, you indicate whether you plan to stop, turn, or change lanes, which helps prevent confusion and enhances safety on the road. It allows other drivers and road users to anticipate your actions and adjust accordingly, thus reducing the risk of accidents.

The other options do suggest situations where signaling might be particularly important, such as when there's a vehicle behind or approaching. However, signaling is a general rule for all driving maneuvers, not just in those scenarios. It's essential to signal whenever you are about to make a move, regardless of the presence of other vehicles. By communicating your intentions clearly, you contribute to a safer driving environment for everyone.