What is the role of airport surface detection equipment (ASDE) and ground radar in preventing runway incursions?

• A. They provide temperature data for runway surfaces.
• B. ASDE and ground radar monitor surface movements, detect potential runway incursions, and support controllers in maintaining separation and safe runway operations.
• C. They are used only for weather monitoring.
• D. They replace the need for controller oversight.

Answer: (C)

ASDE and ground radar provide surface surveillance that’s essential for preventing runway incursions. They continually monitor movements of aircraft and ground vehicles on runways and taxiways, giving controllers a real-time picture of who’s where on the airfield. When a potential intrusion is detected, the system alerts the controller so they can intervene—issuing holds, clearances, or other instructions to maintain proper separation and safe runway operations. These systems are not weather tools and do not replace controller oversight; weather data and runway surface conditions come from other sources, while ASDE/ground radar augment the controller’s ability to keep the runway environment safe.