What color are the inscription signs that provide pilots and vehicles with important information at an airport?

The correct choice is that the inscription signs used at airports to provide pilots and vehicles with important information are black with yellow inscription. This color combination is designed for high visibility and ensures that critical information is easily readable from a distance, which is essential in an airport environment where quick recognition of signs can impact safety and efficiency. The use of black for the background with yellow lettering stands out, even in varied weather conditions or low light, enhancing accessibility for both pilots in aircraft and drivers on the ground.

In contrast, the other color combinations do not meet the specific requirements set out for informational signage at airports. For example, white and black can often represent regulatory signs, while green and white are typically associated with information signs that guide pilots and vehicles but do not convey the same level of urgency for critical messages. Red and white are generally used for warning signs, indicating prohibitions or hazards rather than providing information. Thus, the choice of black with yellow for inscription signs is specifically tailored to ensure clarity and effective communication within the complex airport landscape.