Road-Rail Transport from Nagpur to Madras, then the shortest route would be the Grand Trunk route crossing Balharshah and Bezwada. In doing so, the freight would have moved on the lines of the G. I. P. Railway, the Nizam's State Railway and the M. & S. M. Railway This, then, is an example of through traffic. Obviously the rates for through traffic will be proportionately less than single line rates, since here, the proportion of terminal costs to general transportation expenses would be less than what it would be in the case of a haul on a single line. The terminal expenses are incurred at the termini of the traffic and in the case of through traffic the number of terminal points would be just the same though, if the traffic were to travel over the length of line of each administration separately, the terminal points would no longer be two, but two multiplied by the number of the lines. There is one difficulty that has to be encountered in the case of through traffic. What is the basis on which a charge is made? The answer is not difficult since a ' joint rate 7 would meet the sitiiation, but the real task lies in ascertaining what proportion of the joint rate should be allocated to the different railways concerned, and, here, though the principle of distance would immediately spring up to one's mind and meet fairly'normal conditions, distance alone is no sufficient criterion. It might be that a haul of a thousand miles has to pass 200 miles of Railway A, 300 of B, and 500 of 0. How then should the rate be allocated; assuredly not always in the proportions of 5:3:2, Blind arithmetical accuracy is no modus operandi in railway rates. Other factors have to be considered. Tbe 300 miles of Railway B might -be across hilly country where transportation costs, both initial and recurring, must fee so Mgh as to justify a higher proportion, or tbe 260 &ale$ of A might be the length of a strategic liiSe gh Łosts fer maintenance and upkeep. So, m final ssmtjBfe i&e rate proportion may not be 5:3:2