What is the main reason for using turn signals?

Using turn signals is primarily about communication between drivers on the road. When a driver activates their turn signal, it serves as a clear indication of their intentions, whether they're planning to turn, change lanes, or merge into traffic. This is vital for ensuring safety, as it allows other drivers, cyclists, and pedestrians to anticipate the movements of your vehicle and react accordingly.

This practice helps to prevent accidents and enables smoother traffic flow, as drivers can make informed decisions based on the signals being given. For example, if a driver sees a vehicle signaling to turn left, they can adjust their own speed or position without risking a collision. Therefore, the main reason for using turn signals lies in fostering effective communication on the road, which enhances overall driving safety.

The other options focus on aspects that are not the primary function of turn signals. Fuel efficiency, pedestrian notification, and emergency signaling do not accurately reflect the primary purpose of turn signals in driving behavior and road safety.