The Research On Model And Algorithm Of Transit Lines And Station Adjustment During The Construction Of Urban Subway

As a kind of large capacity, high efficiency and convenient transportation means, Urbanrail traffic has become the first choice of solving the traffic problem of big cities. Due toconstruction sweeping, long construction period, influence range characteristics, the period ofsubway construction will give the city traffic great negative impact. Nowadays, we areadvocating ‘bus priority’, so the public transportation routes adjustment during the period ofsubway construction should not be ignored. How to reduce the impact of urban dwellersduring the period of subway construction has become a key. This paper analyzed the trafficcharacteristics of the construction influence area, focus on the detailed study and discussion ofand transit station adjustment.In the selection of transit lines project selection, we use the method of cosine functionand the method of linear assignment to compare the selection. Two methods have their owncharacteristics, and two have their profound theoretical and practical application value.In the period of subway construction, because of the reasons such as road closed, weneed to selection new sites to some of the transit sites. Through an assumption of the modelconditions, This paper take passengers influence degree for minimum to upper objectivefunction and the passengers change to the smallest to target function, establishing and bi-levelprogramming model of site selection. It used Particle Swarm Optimization to solve the model.Finally, example as the Nanchang City Subway Line1Zhongshan West Road Station,through the investigation analysis and insure the area of construction influenced, we cancalculate OD matrix of dwellers by all means. By doing these, we will obtain OD matrix oftransit only needing calculate transit share rate by Logit model. Then we will choose a projectof transit lines adjustment and select new transit stations. After that, we can obtain a project oftransit lines adjustment of Nanchang Subway Line1Zhongshan West Road Station during theperiod of construction.