Passenger Assignment Model In Urban Rail Transit Systems And Its Application In Emergency Scenarios

China’s urban rail transit is booming,but there are also new problems.With the increasing expansion of the urban rail transit network,there are multiple routes in the same OD pair,and passengers do not need to swipe cards or swipe codes again at the transfer station.Therefore,it is difficult to judge the specific path of passengers and the distribution of passenger flow through AFC data.Meanwhile,passenger travel characteristics in normal scenes are different from those in emergency scenes.Based on this,this paper puts forward the passenger flow allocation model of urban rail transit and its application in emergency scenarios.The specific research contents are as follows.(1)Space-time path search.First according to the K short path search algorithm,calculation of subnet K short path,through the original network china-africa transfer station and transfer station of adjacency relations,joining together to get all OD in the original network for effective physical path,then enter an AFC data provided by the time of the outbound train,through time and space search algorithm to search every passenger specific path of space and time,Realize the matching of passengers and trains.(2)Proportional estimation of spatio-temporal paths.Taking time as the primary factor of passenger choice behavior,the generalized cost function of the effective spatiotemporal path was constructed.According to the improved Logit model,the probability of the effective spatio-temporal path was calculated.Then,the service level was taken as the influencing factor of passenger choice behavior to modify the route proportion.(3)Application of the model in emergency scenarios.According to the difference between emergency scenario and normal scenario,the spatio-temporal path selection and proportion estimation of emergency large passenger flow and operation interruption scenario are adjusted,so that the model is applicable to not only normal operation scenario but also emergency scenario.(4)Calculation of dynamic passenger flow in urban rail transit network under various scenarios.According to the final spatiotemporal path and probability,the passenger flow distribution model is used to obtain the dynamic line passenger flow,transfer passenger flow,cross-section passenger flow,train passenger capacity and the number of people gathered at the platform,so as to analyze the passenger flow distribution law.(5)Emergency response in case of emergency.To develop passenger flow management system and passenger flow control measures to improve the train transport capacity to restore normal operation as soon as possible;In case of operation interruption,train operation adjustment plan shall be formulated,reasonable passenger flow induction measures or flow restriction measures shall be taken,and ground bus connection shall be organized to resume normal operation.