Strategies Of Bus Service Modes Choice Corresponding To The Fluctuated Passenger Flow Of Haining City

The demand for public transport travel in Haining is low,and the cost of public transport passenger enterprises is high.At the same time,fixed-point,fixed-line,fixed-shift regular bus service is difficult to meet passenger demand for personalized travel services.In order to improve the quality of travel services in Haining and reduce the cost of passenger transport enterprises,it is necessary to explore demand-responsive bus services by combining passenger flow characteristics in individual routes.Three service modes were selected: regular bus,route deviation and dynamic bus,and the total cost of each service mode was modelled in two parts: passenger cost(considering passenger walking time,waiting time and in-vehicle time)and enterprise cost(considering vehicle distance travelled,investment and maintenance costs).Forty-five routes in Haining city(nine of which are night routes operating between 19:00 and 23:00)were selected for the study.Determine the passenger flow intensity threshold for selecting the service mode based on the total cost,and select the best service mode through the passenger flow threshold;conduct sensitivity analysis for vehicle type(carrying 9,19,40 and 60 passengers)and vehicle operating speed(22.5km/h,27.5km/h),and determine the best service mode for each route at different times of the day based on the total cost for different vehicle types and operating speeds.The results found that :(1)under the existing vehicle type and operating speed(25km/h),the passenger flow thresholds were obtained as 6-153 passengers/hour for regular bus and route deviation,29-89 passengers/hour for regular bus and dynamic bus,and 35-106 passengers/hour for route deviation and dynamic bus,due to the difference in line length;The two periods are divided into daytime(6:00-18:00)and night time(19:00-23:00),and when comparing the operating hours of each route,20 routes are suitable for dynamic bus service during daytime hours,16 routes need to change their service mode according to the time of day,10 routes are suitable for regular bus service during morning peak hours 7:00-8:00 and evening peak hours16:00-17:00,11 routes are suitable for regular bus service during off-peak hours,and 10 routes are suitable for route deviation during off-peak hours.All 45 routes are suitable for dynamic buses during night time hours.(2)When the vehicle capacity varied from 9-60 passengers,the passenger flow intensity threshold remained unchanged for 32 routes and changed by 1passengers/hour for 13 routes.Although the change in vehicle capacity had little impact on the choice of service mode,the maximum saving after the change in vehicle capacity was 14,111.20 yuan compared to before the change in vehicle capacity;when the operating speed varied from22.5-27.5km/h,the passenger flow intensity threshold changed for all 45 routes,and changed by 1-13 passengers/hour.The change in speed resulted in a change in the choice of service mode on six routes,with a maximum saving of 13,724.51 yuan after the change in speed compared to before the change in speed.The study indicates that:(1)In Haining City,the daytime passenger flow and fluctuations in the peak hours of the line and the passenger flow of the off-peak hours using regular bus,in the passenger flow of the smaller off-peak hours using the route deviation,the night time hours using dynamic bus;passenger flow is small and fluctuations in the smaller lines throughout the day suitable for dynamic bus.(2)Increasing operating speeds and making vehicle capacity smaller can reduce total costs,but the relationship between passenger numbers and service mode remains the same.