What is the function of the reflector in a traffic signal's optical unit?

The function of the reflector in a traffic signal's optical unit is to redirect light. The reflector plays a crucial role in enhancing the visibility of the signal by ensuring that as much light as possible is directed outward and into the path of oncoming traffic. By using reflective materials, the optical unit can focus and amplify the light produced by the lamp, improving the overall intensity and clarity of the signal indication. This redirection maximizes the effectiveness of the traffic signal in conveying important information to drivers, particularly in various weather conditions and times of day. Thus, the proper functioning of the reflector is vital for maintaining safety and traffic flow at intersections.