Problem of Transshipment in Travel Forecasting Model of Tour Structures

between the first origin and the last destination. Many shipments travel by longer, less direct routes. Most available data on commodity shipments within a single country identify the first origins and the last destinations but not any transshipment points along the way. The Commercial Vehicle Survey, provided by the Ministry of Transportation of Ontario, Canada, proved to have particularly useful data on transshipment. This paper focuses on development of a tour structure model in which shipments either pass through one or more intermediate points (a transshipment point or some other consumer) or go directly from the point of production to the point of consumption. The model targets the specific distinctiveness of establishments and the trip characteristics. Factors such as location, origin facility type, destination facility type, commodity type, truck type, distances, and shipment size are most likely to affect the decision of how an industry might deliver its products to another establishment.