What is the main purpose of turn signals in a vehicle?

Answer: B — To signal other drivers of a lane change or turn

The main purpose of turn signals in a vehicle is to signal other drivers of a lane change or turn. When a driver activates their turn signal, it provides a clear visual indicator to surrounding traffic that they intend to change direction. This communication helps to enhance road safety by allowing other drivers to anticipate and react appropriately to the driver's actions. Effective use of turn signals is essential in maintaining orderly traffic flow and reducing the risk of collisions. For example, if a driver intends to make a left turn at an intersection, activating the left turn signal alerts both vehicles and pedestrians that this action is forthcoming. This allows other road users to adjust their speed or position, contributing to a safer driving environment. While the other options might seem plausible at a glance—such as communicating with pedestrians or indicating a driver’s mood—these do not reflect the primary safety function of turn signals in road traffic regulation and control.