| With the development of the global economic and society and the higher level of city modernization in the world, urban traffic congestion is becoming increasingly serious. Thus, as one of the most efficient methods, it is crucial to build a better public transportation system to solve this problem. With the rapid development of rail transportation in China, only expanding transport infrastructure alone can not effectively relieve traffic congestion Researching the characteristics of passenger in stations and reasonable arrangements for transport capacity, is an effective way to solve the traffic congestion。Assembling passengers in the urban rail transit stations platform are closely related to the train arrival interval. Study the relationship between the two, helps the capacity arrangements and equipment for allocation economically and reasonably. At the same time, it is important to improve the daily traffic on the organization and operation.In this paper, the relationship between the assembling passengers in the urban rail transit stations platform and the train arrival interval were studied. The passenger flow directly affected by the train arrival interval. When the total number of passengers entering and leaving stations is constant In a fixed period of time, the train arrival interval directly affect the number of the assembling passengers in the urban rail transit stations platform. According to passengers' dynamic process on the platform of within a train arrival time, this paper designed a way to calculate the number of the assembling passengers in various stages. This paper gathered the actual and forecast data of Dayun Station of Shenzhen Metro Line 3 analyzed the sample with the algorithm. This paper uses the algorithm to study the changes of the number of assembling passengers in the urban rail transit stations platform under three different programs in different circumstances, at the same time, Verified the applicability of related algorithms.
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