Mr. Don Cunningham:

Efficiency gains would not be great in that, with the weight being pulled in terms of tonne-kilometres, we would still have the same wear and tear and we would still need X amount of motive power to pull the carriages. It would be the same total tonnage that would be carried over the same kilometre. The restriction that comes into play is that much of our network, particularly in areas where the freight would be coming from, is on single lines, and to operate successfully we need passing groups, which would mean that if we were too lengthen trains we would need to lengthen the infrastructure to handle it. There are certain areas where there are restrictions in that regard. Also, we would be restricted with our signalling systems, but that would be the last restriction. The restrictions would come into play more in the area of passing loops, stopping and so on.