What action should take place if a vehicle stalls on the runway?

Answer: B — Activate hazard lights and notify ATC immediately

When a vehicle stalls on the runway, the immediate actions taken are critical to ensure the safety of both personnel and aircraft operating in the area. Activating hazard lights serves to alert other drivers and air traffic to the potential hazard the stalled vehicle presents. This visibility is essential on a runway where aircraft and vehicles may be operating closely together. Notifying air traffic control (ATC) is equally important, as they are responsible for managing the airspace and ensuring the safe movement of all aircraft. By informing ATC, they can issue necessary warnings to any approaching aircraft, preventing potential accidents or collisions that could arise from an unexpected obstruction on the runway. Taking these steps prioritizes safety and minimizes risks associated with a stalled vehicle. Other potential options, such as calling for assistance, trying to restart the vehicle, or abandoning the vehicle, do not provide the immediate safety measures needed in this critical situation. While assistance may be necessary and attempting to restart the vehicle may seem logical, the paramount concern is ensuring that air traffic is aware of the situation and can react appropriately to avoid incidents.