How many stop lamps are vehicles required to have, and what colors must they emit?

Vehicles are required to have a minimum of two stop lamps that emit either red or amber light. This requirement is critical for ensuring that other drivers are clearly signaled when a vehicle is decelerating or coming to a stop. The use of red or amber provides high visibility, which is essential for safety on the road.

Having two stop lamps enhances the visibility of the stop signal, as it allows for a more noticeable indication of the vehicle’s intention to stop, which can be particularly important in conditions of limited visibility or heavy traffic. The color specifications, with red being universally accepted for stop signals, help communicate the same message across all vehicles, reducing confusion among drivers.

In contrast, options that suggest only one stop lamp or colors such as green or white do not meet regulatory requirements, thereby failing to ensure that adequate signaling is available for safe operation on the road.