Strategic expansion of freight transportation hub networks under demand uncertainty
研究了货运承运人通过合并扩张网络时，如何重新设计枢纽网络以最大化利润，并分析了货运量不确定性对网络结构的影响，基于美国零担货运公司的案例。
We focus on freight transportation carriers that transport shipments that are small relative to vehicle capacity and incur transportation costs that exhibit economies of scale. For such carriers, profitability is driven by shipment consolidation, which is achieved by routing shipments through a network of hubs. We consider a carrier that seeks to expand its network into new regions by merging with carriers that already operate in those regions. We focus on how, and by how much, the network that results from such a merger should be redesigned to maximize profitability. We perform a case study based on operations from a multi-regional United States Less-than-truckload freight transportation carrier to derive insights into the profitability of different redesign strategies. We derive insights into how a network that results from a merger should be redesigned. We also study how uncertainty in shipment sizes impacts the structure of the redesigned networks. • Studies redesign of merged transportation hub networks for maximum profitability. • Introduces three profit-maximizing capacitated hub location models. • Transportation costs between hubs are modeled on a per-vehicle basis. • Two different stochastic models address the impacts of shipment size uncertainty. • A case study is presented based on a multi-regional freight transportation carrier.