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 “controlAn action, message or signal that, in coded mode, activates ... More system”. In relation to train runningThe set of techniques, standards and procedures that charact... More, the ControlAn action, message or signal that, in coded mode, activates ... More can better specify itself in “operational” and “non-operational” (informative) depending on whether the train traffic automation systems (V.) permit or not a direct controlAn action, message or signal that, in coded mode, activates ... More action on the signaling. V. Regulation
