Why must airport fire trucks be electronically trackable on runways?

Answer: To show up clearly on surface-tracking displays and feed conflict alerts

To send a signal that makes landing jets slow down automatically — Wrong. A truck's electronics do not tell an arriving jet to brake. Landing performance depends on the aircraft and crew. The point of electronic tracking is earlier: helping the airport notice that a vehicle and an aircraft are moving toward the same protected space.

To switch on runway edge lights ahead of an arriving aircraft — Wrong. Runway lights guide pilots and mark surfaces, but that is not why a truck needs to be electronically visible. The real value is that the vehicle can appear clearly on tracking displays and feed alert systems before a conflict grows dangerous.

To show up clearly on surface-tracking displays and feed conflict alerts ✓ — Correct! Modern runway safety does not depend on eyesight alone. Airports use surface-tracking tools and conflict alerts to keep a live picture of aircraft and vehicles. If a fire truck is hard for those systems to identify, controllers lose one whole layer of protection and must rely much more on voice calls and visual spotting.