Train traffic: management and signalling
Mechanical control of points and signalling devices has given way to electric control, which is more reliable and requires fewer staff. Train traffic is now managed from a distance from control centres.
Sensors constantly monitor the location of trains or metro train sets for traffic control purposes. The data is sent in real time to the control centres and the train drivers, as well as to the public in certain cases.
These highly complex systems make considerable use of automatic devices, computers and information and communication technologies.