Gus, I'm not sure that such a situation would be very common: If we're talking two half carloads, then it would most likely mean that the commodity is from the same supplier. (A shipper is unlikely to put a part-load in a car, then send it elsewhere to be filled.) The only lcl shipping that I have any knowledge of is the former operation of the CNR, working out of Palmerston, Ontario, in the mid-fifties. Here, carloads of different commodities arrived and were unloaded, broken up into smaller lots, then reloaded into other cars, each bound for a different destination. Part loads from many different cars were placed in each car that was bound for a different destination, then the individual cars were place in the appropriate train. As the train travelled the division, the cargo destined for each town would be unloaded, either at the station, or at a freight house or teamtrack. New lcl would be taken on, too, if the train was headed in the proper direction. The transfer facility in Palmerston, which was a hub for a number of rural branchlines, was run by the CNR. Outbound lcl from the various communities on the branches was also consolidated here into different cars bound for various urban centres.
Wayne