What type of sign features a black background with a yellow inscription and a yellow border?

The correct answer is that taxiway and runway location signs feature a black background with yellow inscriptions and a yellow border. These signs are designed to provide pilots with critical information about their position on the airport surface, helping them navigate safely between taxiways and runways. The use of a black background coupled with yellow text enhances visibility and readability from the cockpit, especially under various lighting conditions.

Taxiway and runway location signs are strategically placed at critical points on the airfield to ensure clarity in communication of location information to pilots. This design standard helps maintain uniformity across airports, allowing pilots to quickly recognize and understand their surroundings regardless of the airport they are operating in.

While runway distance signs, information signs, and airport boundary signs have their own specific color schemes and purposes, none employ the black background with yellow text format that is characteristic of the taxiway and runway location signs. Each type serves a distinct function: runway distance signs indicate the remaining distance to a runway threshold, information signs provide general guidance about facilities, and airport boundary signs denote the limits of the airport property.