What is indicated by location signs?

Location signs serve a critical purpose at airports by providing information about specific locations, such as taxiways or runways, on an airfield. These signs are strategically placed to guide pilots and ground personnel, ensuring that they can easily identify where they are situated on the airport's layout.

The design of location signs typically features a black background with yellow text or symbols, denoting taxiway designations, runway numbers, or specific terminal locations. This clear visibility is essential for navigating the sometimes complex airfield environment, particularly in low visibility conditions.

In contrast, other options pertain to different aspects of airport operations. Runway traffic flow, for example, relates to the patterns and procedures that govern the movement of aircraft on runways, while maintenance zones are specifically marked for safety during aircraft servicing. Runway closing information, on the other hand, would involve alerts about runway availability but does not serve the identification purpose that location signs fulfill. Thus, option B accurately captures the essence and functionality of location signs in an airport setting.