Study On The Urban Rail Transit Category Selection

The selection and decision-making of urban rail transit system(URT) Category play a crucial role for the realization of system function and service goals,the improvement of running efficiency and operational benefits,the saving of cost and energy consumption,and the prosperous development of URT.However,lacking scientific and systematic methods of URT-Category selection often results in many problems,such as indefinite objective of the line and passenger service,unsuitable situation between transport capacity and passenger traffic volume,unsuitable situation between service level and passenger traffic demand.Therefore,determining how to choose proper URT-Category is instrumental in service demands and function planning of URT.The objective of this study is to analyze the theory of URT-Category selection,and find systemic URT-Category decision-making methods.These theories and methods can help us to define proper functional localization,service level and standard of performance for different characters of cities and different conditions of traffic demand, so that to select reasonable URT-Category.The main research works are as follows.1.Decision-making arrangement of URT system.The selection of URT category is concerned with city conditions,city traffic demands and system functional requirements. It includes three levels:firstly,URT-Transportation-Mode in macro-level;secondly, URT-Category in middle-level;thirdly,URT-Vehicle-Type in micro-level.2.The "URT Transportation Mode-URT Category-URT Vehicle Type" three-level theoretical system.Based on the URT decision-making arrangement,the "URT Transportation Mode-URT Category-URT Vehicle Type" three-level theoretical system is put forward in this thesis.In order to realizing suitable function, advancing efficiency and saving resources of URT system,city should separately make high-level,middle-level and low-level decision to select URT Transportation Mode, URT Category and URT Vehicle Type.3.The classification,character and applicability of different URT-Category.At the view of functionality,performance,range of application and technique features, URT-Category is divided into six categories:Metro System,Light Rail Transit(LRT) System,District Express Rail System,Suburban Railway System,Streetcar System and New Type Rail System.The advantages,disadvantages,technique features,scope of application and developing trend of each URT-Category are also discussed.4.An URT-Category selection method depending on URT-Transportation-Mode. The idea that URT-Category is determined by URT-Transportation-Mode is basic to an excellent URT-Category selection method depending on URT-Transportation-Mode. For the construction of "low cost,high efficiency" and resources saving URT system, some suggestions of URT-Transportation-Mode decision and URT-Category selection are concluded.5.An integrated decision-making model of URT-Category selection.The integrated decision-making model with AHP-entropy-grey relation grade is an important method of URT-Category selection.When we know some data of function or performance demand,the integrated decision-making model can realize quantitative calculation to make accurate decision of URT-Category selection.6.Discriminant Analysis Method is used to select URT-Category.The Distance Discriminant Analysis Method can make use of the application experience of former cities,to help other cities to select their URT-Category.Taking metro system for example,the Stepwise Discriminant Analysis Method is used to assess weight of examine and approve indexes.The result indicates,that the Gross Domestic Products (GDP),the financial disposable revenue,the total population,the conventional bus transit and the built-up area is the most important basic indexes of metro system selection in Chinese cities.7.A case study.For an application demonstration,the URT-Category selection of Shanghai rail transit planning network and Line 11 Southern subsection is studied by the methods raised in this thesis.The case study shows that all the methods of URT-Category selection can help cities to make proper decision.