Why is it written on the back of the train? And in the last room or why?
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There must be an important reason to appear in the latest car. An X sign is written on the last wagon of the train to give the message of safety from any accident. At the same time, the corresponding mark helps to identify the last bogie of the train.
Again, if the box marked X is not a sign on the back of a train, the sign helps staff understand that the train is in an emergency. In that case, there is a possibility of an accident if a special coach separates from the train.
Not only that, the guard in charge of displaying the green flag at the railway crossing saw the X sign and made sure that all the bogies of the train were together. When the sign is not very visible in the dark of night, the red light below the sign helps determine the last coach of the train. In that case, when the sign and light are not visible to the naked eye, the train is considered a problem. Railway workers have warned the authorities in anticipation of the accident. After all, this important sign protects passengers from any accidents or mishaps!