<P> At the rear of the train is the guard's cabin . It contains a transceiver, and is where the guard usually gives the all - clear signal before the train departs . </P> <Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2018) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2018) (Learn how and when to remove this template message) </Td> </Tr> <P> Trains are sorted into categories which dictate the number of stops on a route, their priority on the network and their fare structure . Each express train is identified by a five - digit number . if the first digit is 1 or 2 in the train number, they are long - distance express trains . If the first digit is 0, the train is a special train which will operate for a limited period of time with a different fare structure . A first digit of 5 denotes a passenger train . </P>

Who is known as father of indian railways