What is the purpose of turn signals?

The purpose of turn signals is primarily to communicate intentions to other drivers on the road. When a driver activates their turn signal, it serves as a visual cue to those around them that they plan to change lanes or make a turn. This communication is crucial for maintaining safety and predictability in traffic. By signaling their intentions, drivers help prevent accidents by allowing other road users to anticipate movements and adjust accordingly.

While the other options touch on various aspects of driving, they do not capture the fundamental role of turn signals in traffic safety. For instance, turn signals are not exclusively for pedestrians, nor do they provide information about speed changes or specifically alert emergency vehicles.