Study On Cross-line Train Routing Optimization Of Pearl River Delta Intercity Rail Transit Network

In recent years, with the rapid development of intercity rail transit system in our country, the existed intercity rail transportation organization methods are no longer suitable for the new network condition. In order to let intercity rail transit network play an integral role, adopting advanced and reasonable transportation organization and operation management methods will be the research focuses of intercity rail transit system at the present stage, among which working out the passenger train operation plan consistent with intercity rail transit network features and passenger flow characteristics is the most important.In the progress of working out the passenger train operation plan, firstly we should determine the running sections and the number of passenger trains in pairs, that is determining the train routing. Adopting reasonable train routing could improve vehicle utilization efficiency without reducing the service level, avoid traffic capacity waste, and make the traffic organization economical and reasonable. The paper focuses on the cross-line passenger transport organization, and studies on the cross-line train routing optimization, based on the Pearl River Delta intercity rail transit network structure features and passenger travel demands, considering both of intercity railway transportation enterprises and the interests of passengers, which has important theoretical and practical significance.The paper includes several parts as the following shows:(1)Studying on the Pearl River Delta intercity rail transit network planning. Firstly, combined with the current development condition of the Pearl River Delta urban agglomeration, the paper analyzes the intercity rail transit network planning, elaborating the structural characteristics and line features of the planning rail network. Then, the paper analyzes the passenger terminal layouts of the rail network, providing the station plane schematic diagrams of every city. Finally, the paper analyzes the rail network interworking pattern, described with graphical representation.(2)Studying on the node level division of the Pearl River Delta intercity rail transit network.Firstly, elaborating the concept of network node, as well as the selection range, analyzing the node construction of the Pearl River Delta intercity rail transit network. Then, based on the comprehensive consideration of the various factors involved in the node level division, adopting the passenger transport demand, the network characteristics, the passenger transport capacity, and the political and economic influence as the main basises. Finally, based on the grey correlation decision making method, the paper carries on the division of the intercity rail transit network node level, and through the collection of the Pearl River Delta urban indicator datas, obtaining the node level division results of the intercity rail transit network.(3)Studying on the cross-line passenger transport organization mode of the Pearl River Delta intercity rail transit network. Firstly, the paper makes a general discussion, analyzing the main influence factors, advantages and disadvantages of different transport organization modes are compared. Then, the paper analyzes the cross-line passenger transport organization mode according to the network condition, based on the analysis of the cross-line train operation mode, the paper conducts a research on the cross-line passenger transport organization mode among different levels of nodes. Finally, through the example analysis of the Pearl River Delta region, the paper works out the cross-line passenger transport organization mode.(4)Studying on the cross-line train operation optimization of the Pearl River Delta intercity rail transit network. Firstly, combined with the characteristics of the intercity rail transit EMU overhaul, analyzing the Pearl River Delta intercity rail EMU overhaul layouts. Then, based on the principle of "operating according to the passenger flow" and the EMU overhaul needs, determining both sites of the cross-line train routing. Finally, building a mathematical programming model with the minimum cost of passenger train operation and the shortest passenger travel time as the optimization objectives, the paper conducts a research on the cross-line train operation optimization, and solving with ant colony algorithm.Combined with the example of Pearl River Delta intercity rail transit network, the paper obtains the cross-line train operation optimization results.