Study On The Location Of Public Logistics Terminals

There are many problems concerning the development of logistics, such as congestion, negative environmental impacts and high energy consumption. To cope with these problems, public logistics terminals have been constructed in the vicinity of expressway surrounding large cities. This paper focuses on the size and location of public logistics terminals.The concept of public logistics terminals are described firstly. Since the aim of constructing logistics terminals is to reduce the total social and environmental costs of urban freight transport, the condition of road network must be considered. In part 4,the distribution of traffic volume under the condition of the user equilibrium is discussed. Part 5 describes the optimization in designing public logistics terminals. A mathematical model is made to deal with the optimization of the size , which is represented by the number of berths. Queuing theory is used to solve this model. Then the location of logistics terminals is described. An objective function is made using the trade-off between transportation and facility costs, within this model, the user equilibrium assignment procedure is used for determing truck and passenger car traffic on the road network under any location pattern of candidate sites of public logistics terminals. The model is solved by genetic algorithms. Part 6 concludes the paper and proposes the further investigation.