The **reverse light** primarily serves to **warn other users that the vehicle is going to move in reverse**. This light turns on automatically when the vehicle starts moving backward and is white in color. It is mandatory for all automobiles, except motorcycles, and optional for three-wheeled vehicles and heavy quadricycles.


In contrast, the **brake light** is bright red and is used to indicate that the vehicle is braking. This light turns on when the driver presses the brake, for example, when stopping at a red traffic light. Therefore, its function is different from that of the reverse light.

In summary, the reverse light is essential to **alert other drivers and pedestrians** that a vehicle will move backward, helping to prevent accidents and improve road safety.