Railway Age - April 2011 - 28. COMPUTER-AIDED TRAIN DISPATCH. Computer-aided train dispatch. Computer-aided train dispatch. Computer-aided train dispatching with expert systems. Flashing green for productivity. Thus they are, first of all, safety devices that help trains avoid collisions, but they are also tools for maximizing the efficiency of both train operations and track use.”
In effect, they are productivity tools. A railroad cannot operate safely—or productively—without some form of traffic and/or train control system. Dark territory or CTC, TWC or ABS or PTC—without some form of control, trains cannot (or should not) move at all. Ansaldo STS.