What color is the reflective sign that must be displayed on slow-moving vehicles?

The correct response indicates that the reflective sign required for slow-moving vehicles is orange. This is specifically designed to alert other drivers to the presence of a vehicle that may be traveling at a lower speed than the rest of traffic. The use of orange for these signs is standardized and easily recognized by motorists, providing a clear visual cue to increase awareness and safety on the road.

In context, the other colors listed do not correspond to the signs for slow-moving vehicles. Yellow is often associated with caution and warning signs, green is typically used for directional and informational signs, while red indicates stop or prohibition. Each color serves a specific purpose within traffic management and safety protocols, making it essential for drivers to recognize and understand these color codes while on the road.