What color is the Mandatory Instruction Sign?

The Mandatory Instruction Sign is red with white lettering, which makes it easily identifiable and communicates a sense of urgency. This color combination is standard in many safety protocols, including aviation, indicating that the instructions conveyed are crucial and must be followed without exception.

Red as a color is universally associated with stop or caution, making it the ideal choice for mandatory instructions that require a prompt response from vehicle operators and personnel on the airside. By using this clear visual cue, the sign ensures that its significance is recognized immediately, thus enhancing safety and compliance in high-traffic areas such as airports.