Research On Line Connecting Between Ground Conventional Public Transport And Urban Rail Transit

At present,many cities in china have started to build urban rail transit,to alleviate urban traffic congestion. Urban rail transit has many advantages,but the network is difficult to build in a short time; At the same time,the urban rail transit has a bad accessibility because of its line is solid, what make it difficult to achieve the "door to door" service. So in order to attract more passengers flow, and make up the poor accessibility of urban rail transit by the flexibility of other forms, it must be combined with other transportation like ground bus. However, there are many elements about the engagement of conventional traffic and rail transit. The line network optimization problem between conventional bus and urban rail transit must be taken into account.Firstly, in the process of research, the paper define the connotation and characteristics between conventional traffic and rail transit, then making a contrast about technical characteristics, scope of services and comprehensive benefits. The relationship between cooperation and competition, topological relationship, and the integration of functions are also be analyzed. Secondly, the paper analyzes the mechanism linking coordination between conventional bus and urban rail transit from interchange coordination, line network optimization of coordination aspects. Setting up travel cost model and the travel time model by analyzing the composition of passenger travel cost, travel time. Finally, the optimal strategies and overall adjustment principles of conventional bus network and line optimization are proposed, based on the research about influence factors of optimizing adjustment. And based on the shortest travel time of passengers, the minimum cost of passengers and operators, established an objective function model. In the end, take an example solve the model proposed for solution and analyzed and discussed by using matlab genetic algorithm toolbox.It can reduce the repeated coefficient of conventional bus lines, improve the efficiency of public transport, ease traffic congestion along the rail transit through optimization reasonably; At the same time, it also can improve the passengers travel efficiency along the rail transit within the scope of influence, expand the influence of urban rail transit, change the structure of passenger travel and increase the share proportion of rail transit, ease urban congestion Fundamentally.