Sistema di Controllo della Marcia del Treno (SCMT) is a discontinuous train cab signalling system used in Italy.The main purpose of SCMT is to control the respect of the speed limit imposed by the signal aspect and the line condition.As said before, SCMT is a discontinuous system; this means that it is not aware of next signals' aspect changes unless it passes upon the relative PIs.SCMT has some benefits, in respect of the RS alone: However, it has some disadvantages: To partially solve the first two points, the "V-V-V" (stands for Verde-Verde-Verde) has been introduced.The following table shows the meaning of the signal codes icons used on the display and the target speed the train has to reach according to the braking curve/signal aspect-code.