Why is there a cross mark on the backside of a train (Indian Railways)?

Why is there a cross mark on the backside of a train and what is the meaning of that (Indian Railways)?

At the back of the train in India, a large cross (X) is made of yellow colour in blue background behind the guard coach. There is an indication for this station master that the whole train has left the station, no part of it remained in the block section. Then he gives permission to the last station to leave a second train, which is also called line to give clearance. The distance between the two railway stations is called block section.
Look in the picture above, there is also a large yellow cross and in the bottom left a spherical plank is also hanged on which the LV is written. This LV means 'Last Vehicle', It is the responsibility of the guard to hangup this board. It is always in his line box. At the time of duty off, he withdraws his LV board and the second guard on duty hang up this board. In the night instead of the board, the tail light with a red light is tanged. This LV board with cross and tail lamps with red light is necessary in the day and night respectively.
Why there is a need of it. Let's assume that a train leaved from Station A and broke his coupling in the block section and half the incomplete train reached at Station B and Station B realized that the train complete train reached out, he would give the clearance to Station A to leave the other train and in block section, it will be collide with the missing coaches of the previous train and will become a huge accident.
Why is there a cross mark on the backside of a train (Indian Railways)? Why is there a cross mark on the backside of a train (Indian Railways)? Reviewed by SHERE KHOJRAHA on January 12, 2019 Rating: 5

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