Typical expression in cybernetics and systems theory, which designates the detection of the output (response) signals of a system to perform evaluation, decision and modification activities on input signals (input). More generally, it refers to a “control system”. In relation to train running, the Control can better Specify it self in “operational” and “non-opera tional” (informative) depending on whether the trainAny guided drive vehicle on the track, with or without coupl... traffic automation systems permit or not a direct controlAn action, message or signal that, in coded mode, activates ... action on the signalingSet of signals, instruments and standards necessary to regul.... See Regulation.
