Study On Coordination And Dispatching Of Urban Mass Transit Passenger Flow

The scale of cities has expanded rapidly in recent years,and more and more people have poured into and settled in big cities,causing serious urban traffic congestion for several hours.Rail transit has occupied an increasingly important position in urban public transportation due to its large capacity,high speed,high environmental protection and other advantages,and bears the main traffic pressure of the city.However,urban rail transit often suffers from sudden large passenger flows due to large-scale events,holidays,and bad weather.Sudden large passenger flows will not only cause a large number of passengers to accumulate in rail transit stations and cause safety hazards,but also due to the structure of the urban rail transit network.,It will also cause the impact of large passenger flow to spread to other stations on the line,especially the rail transit transfer station,and also generate the superposition of passenger flow from multiple lines and different directions,further worsening the impact of sudden large passenger flow on the rail transit system.Therefore,it is of great significance to ensure the normal operation of urban public transportation to quickly evacuate the sudden large passenger flow of rail transit under the premise of ensuring safety.Based on the trend of data changes,the current status of rail transit operations in my country is described.The current status of research on mass rail transit passenger flows at home and abroad is summarized from three aspects: mass passenger flow transmission,passenger flow evacuation measures,and ground emergency bus connections.Taking the coordinated evacuation of large passenger flows by rail transit and public transportation as the research focus,the research goals and technical routes of this article are given.Collect and sort out recent rail transit passenger flow data,analyze the time and space distribution characteristics of urban rail transit passenger flow,and provide reference data for subsequent case simulations.Analyze the causes and characteristics of the sudden passenger flow,and judge whether the station generates a sudden passenger flow according to the service level of the platform and the maximum passenger flow that can be accommodated.The steps and methods for formulating static current-limiting measures based on key equipment in rail transit stations under the condition of sudden large passenger flow are proposed,and the parameter analysis and calculation methods of rail transit single-station current-limiting schemes are studied.The Poisson distribution is used to simulate the inbound passenger flow,and the algorithm is designed to obtain the rail transit train timetable,which realizes the flow of passengers on and off and transfers,as well as the update of the train passenger volume and platform passenger flow status,and realizes the rail transit station as the center,Simulation of passenger flow process with train as the carrier.Under the condition of understanding the demand of passenger flow,plan the candidate stops and routes of ground transportation public transportation.Determine the three objectives of the shortest passenger evacuation transportation time at the station,the least transferred passengers,and the least investment in ground transportation bus capacity,construct a cooperative evacuation model,and use NSGA-II genetic algorithm to solve the model.With reference to the case background of some line establishment of an urban rail transit network,the passenger flow status of stations and downstream stations when there is a sudden large passenger flow is analyzed through passenger flow simulation,so as to determine the passenger flow demand planning candidate transportation bus stations and routes,and solve the coordinated transportation Model,get the organization plan of collaborative evacuation.Case verification shows that the collaborative evacuation model can effectively reduce the duration of sudden large passenger flows and reduce the duration of large passenger flows at rail transit stations by about 40%.Combined with the current limit measures for single rail transit stations,the passenger flow status in rail transit stations can be guaranteed Within the safety threshold,while reducing the waiting time of passengers outside the station.