What type of light must vehicle stop lamps emit?

Vehicle stop lamps are required to emit a steady or pulsating red light to clearly indicate to drivers behind that the vehicle is slowing down or stopping. This is a standard safety feature designed to enhance visibility and alert other road users. The steady red light provides a clear and consistent signal, while a pulsating red light can catch the attention of surrounding drivers even more effectively, particularly in less than ideal lighting conditions or heavy traffic.

The emphasis on red is critical, as this color is universally understood to signify caution or stop, ensuring that there is no ambiguity about the vehicle's intention to halt. It is essential for maintaining safety on the road, as effective communication of a vehicle's actions helps prevent rear-end collisions and enhances overall traffic flow.