When should drivers contact the Airfield Management/Control Tower?

Answer: B — When their vehicle becomes disabled on an active taxiway

Drivers should contact Airfield Management or the Control Tower when their vehicle becomes disabled on an active taxiway because this situation poses a significant safety risk. An aircraft in motion or preparing for takeoff could be affected by a disabled vehicle on the taxiway, possibly leading to an accident or incident. By informing the Control Tower, the driver ensures that air traffic control can take necessary actions to reroute or hold aircraft, thereby maintaining safety in the airfield environment. While contacting Airfield Management or the Control Tower may also be necessary in other scenarios, such as entering the airfield or when driving near the runway, the immediacy of the risk involved with a disabled vehicle makes it crucial to report this condition as soon as possible. Parking a vehicle does not require the same level of urgency and coordination as a situation where a vehicle is incapacitated on an active taxiway.