According to the Transportation Code, what color must a lighting device or reflector mounted on the rear of a vehicle be or reflect?

In the context of vehicle regulations outlined in the Transportation Code, rear lighting devices or reflectors must be red. This requirement is established to ensure visibility and safety on the road, allowing other drivers to clearly perceive the presence and position of the vehicle from behind. The color red is universally recognized as a warning signal, which is why it is specifically designated for these types of lights on the rear of vehicles.

The use of red lights helps to prevent accidents by providing clarity about a vehicle's intentions, especially when braking or stopping. For example, brake lights must be red to alert following drivers that the vehicle is slowing down. This standardization of lighting colors contributes to traffic safety and uniformity across different types of vehicles.