We are worried about drones, what could happen if they stop working and start falling down from the sky? It might be dangerous and they might hit someone on the head. NASA is now developing a system in which drones automatically select the best place to land during a malfunction. System is called Safe2Ditch, it is the technology that would make drones continuously run a self-diagnostic checks while in flight. In problematic state, the system would estimate how much longer the aircraft was able to remain airborne, and would adapt manner to keep it flying a little longer. It will search a location in the database where it would be safe to land. Then the aircraft would perform a landing using sensors to confirm that no one was standing beneath it.
The technology could reduce the risks of unmanned aerial vehicles flying over populated areas. There’s more information in the following video.