What is the function of a tail lamp on a vehicle?

The function of a tail lamp on a vehicle is primarily to provide a steady burning low-intensity light located at the rear. This light serves to increase the visibility of the vehicle to other drivers, particularly in low-light conditions, thereby enhancing safety on the road. Tail lamps are essential for indicating the presence and position of a vehicle to those driving behind, especially during nighttime or adverse weather conditions.

While other options describe different types of lights that serve specific purposes—such as turn signals or emergency lights—tail lamps are distinct in their function of offering consistent illumination. They do not blink or flash but are designed to remain lit whenever the vehicle is running, ensuring that it is easily seen from a distance.