1 / 8All train travellers must have observed the X sign at the back of all Indian Railways trains and wondered why it exists. 2 / 8The cross sign or ‘X’ is essential for passenger safety.3 / 8The X indicates the last coach of the train. 4 / 8By viewing the X sign at the back of the train, the railway officials get a confirmation that the train has passed in its entirety without any missing coaches being left behind.5 / 8The Letter “X” is used in the mornings. At night, there is an LED lamp mounted on the last coach that keeps blinking which gives confirmation that the train has passed when the visibility is low. 6 / 8If the last coach of the train doesn’t contain the X symbol, then it shows an emergency situation for the train or that the train is running with a few missing coaches. 7 / 8In the above situation, this helps the railway officials stay alert and act quickly in case of an accident.8 / 8They are able to take a quick action to locate the separated/left out coaches and ensuring the safety of the passengers travelling within. Additionally, there is also a small board with ‘LV’ (black on yellow) which is attached to the rear of the vehicle which signifies the end of the vehicle.