In traffic signaling, what does a functioning turn signal indicate?

Answer: B — The vehicle is about to change direction

A functioning turn signal is an essential communication tool used by drivers to indicate their intention to change direction. When a driver activates their turn signal, it informs other road users—such as pedestrians, cyclists, and other vehicles—about the driver's planned maneuver. This indication helps to promote safety on the road by allowing others to anticipate and respond appropriately to the change in the vehicle's trajectory. Using a turn signal is not about the vehicle's speed or just a general warning; rather, it specifically conveys that the driver intends to make a turn or lane change. This clear communication reduces the likelihood of collision by ensuring that everyone is aware of the driver's intended actions. Understanding this function of turn signals is vital for safe driving practices and maintaining effective road safety.