1. Fuel consumption is assumed to be proportional to load factors. A 90 per cent load factor has been considered for rail wagon utilization and 70 per cent in terms of weight utilization (UNESCAP, 2008). We have also taken into account the demand imbalance that exists to and from the dry ports. This results in a 10 per cent empty wagon movement. The imbalance problem has been further aggravated in the recent past because of the additional wagons introduced by private operators and the almost simultaneous fall in traffic (UNCTAD, 2009).