What is the color range allowed for signaling devices mounted on the rear of vehicles?

The correct response identifies the permissible colors for signaling devices on the rear of vehicles, which include red, amber, and yellow.

Red is universally recognized for warning and stopping; it’s commonly used for brake lights and tail lights, indicating that drivers should proceed with caution or prepare to stop. Amber and yellow are typically associated with warning lights, providing visibility to other drivers about potential hazards. These colors serve to enhance roadway safety by clearly signaling the intentions and status of the vehicle to others on the road, thus facilitating safer driving conditions.

The other color combinations presented do not align with standard traffic regulations regarding rear signaling devices. For example, while blue is often reserved for emergency vehicles, and green does not typically signify a warning or caution, these are not representative of the legally accepted signaling color spectrum for vehicles in motion.