Abstract: The traffic assignment theory has been applied to the container collection and distribution system of port group. Taking the minimum generalized logistics cost as the objective function, considering the reloading and connection between different modes of transportation, the traffic assignment model of collection and distribution system for the port group was constructed and solved by incremental allocation method and Dijkstra algorithm simulation. The container collection and distribution system of port group in Shandong Province was taken as an example. The research shows that when less than 70% of the total collection and distribution volume is allocated to the existing transportation network, the transportation cost rises slowly; starting from the distribution of 80% of the total amount, the regional transportation cost increases sharply; the existing transportation network has been overloaded until the allocation reached 100%. Increasing the container traffic volume of Delong-Yan Railway (under construction) or building a new “Central Railway” can effectively reduce the total container logistics cost of the port group, reaching 2.24% and 4.18% respectively. If the two railways operate simultaneously, the total logistics cost can be significantly reduced by 11.69%.

Key words: traffic and transportation engineering; collection and distribution system of port group; generalized logistics cost; traffic allocation; road impedance; multimodal transport

摘要： 将交通配流理论运用到港口群集装箱集疏运系统中，以广义运输成本最小为目标函数，考虑不同运输方式之间的换装与衔接，构建港口群集疏运系统交通配流模型，利用增量分配法和Dijkstra算法仿真求解，并以山东省港口群集装箱集疏运系统进行验证。研究表明：当分配70%以下的集疏运总量到现有交通网络中时，运输成本上升缓慢；从分配80%的总量开始，区域运输成本急剧增加；至100%时，现有交通网已超负荷运行。通过增加建设中德龙烟铁路的集装箱运量或新建“中部铁路”能有效降低港口群集装箱物流总成本，分别达到2.24%和4.18%；若两条铁路同时运营，物流总成本可显著降低11.69%。

关键词: 交通运输工程；港口群集疏运系统；广义运输成本；交通配流；道路阻抗；多式联运