By detecting the location, direction and speed of the moving train, the automatic train protection system (ATP) can provide instant monitoring, train data and driver supervision of the train movement. The ATP system will also immediately warn the driver when encountering dangerous situations and implement emergency brakes. Moreover, the system possesses the characteristics of simplifying wayside rail signals, Fail Safe designs and backup designs to ensure operational safety of the train.
The ATP System in TRA falls in the category of Level 1 in the European Train Control System (ETCS) in which the acquirement of train movement authority and permitted moving distance is based on the data provided by the wayside signals. The coding of wayside signal data and train control signal will then transfer the approved speed instructions to the driver's display panel via balises between the rails. In addition, the train location is detected by the axle counter or track circuit section. Thus, the TRA signaling system is categorized as a "Fixed Block Signaling System".
The train control system of TIAA MRT is a more enhanced system, CBTC-EP, and its ATP system falls in the category, Level 2, in ETCS. The difference of this level 2 ATP system comparing to the TRA level 1 system is that the acquirement of train movement authority and permitted moving distance is based on a wireless communication system which reduces the number of wayside signals needed. In addition, the train locating mechanism is provided by the wayside APR balise and on-train receiver which increases line capacity and reduces headway.
The ATP system in TIAA MRT will greatly reduce operational accidents caused by human error and hardware malfunction. Moreover, with the combination of the disaster detection system, there will be far less operational accidents due to weather or inevitable natural disasters such as earthquakes and mudslides.