why do some people comment when they don't know anythng fully .... PNBE - CSTM is 1710 kms, via shortest route,,, and PNBE - TATA = 498, TATA - CSTM 1718,,, total 2216 kms, the rule for telescopic ticket says, the ticket u want to take must not exceed 15% of the shortest route of the source and destination..... last year it was 20%.... so 15% of 1710 = 256,,, so the ticket distance must not exceed 1966 kms.... he he he ENJOY!!!!