Research On The Assembling Number Of Passengers At One-platform-transfer Station Of Urball Rail Transit

The convenience and punctuality of urban rail transit makes it become the first choice of more and more passengers for daily travelling. Unfortunately, some stations have a long transfer distance and passengers have to walk a long way for transferring, which results in a low attraction of urban rail transit. One-platform-transfer station is a good measure to solve this problem. However, due to the fact that the passengers wait for trains in the same platform, the assembling number of passengers (ANP) has been paid much attention from a perspective of safety.The classification of transfer pattern in urban rail transit and the merits and faults of the one-platform-transfer was discussed in the research. Three application cases of one-platform-transfer in and abroad were introduced. The influence factors of ANP at one-platform-transfer station were analyzed from the aspect of transport demand and transport supply. The calculation methodology for the maximum assembling number of passengers (MANP) at one-platform-transfer station was presented for varied arrival intervals. The availability of the methodology was tested in an assumed case. The sensitivity of headway and the rate of transfer in alighting passengers were also analyzed. In the end, the real-time ANP was described through the software of Anylogic, which tested the accuracy of the presented model. The following conclusions were drawn according to the research.(1) The merits of one-platform-transfer include decreasing transfer distance and reducing walking and waiting time for transfer passengers, which enhance the transfer efficiency strikingly. On the other hand, one-platform-transfer is lack of cushioning capacity for massive arrival of a great number of passengers. The long delay of trains on some line easily leads to overcrowding on the platform.(2) In view of transport demand, the passengers’time and space distribution characteristics in urban rail transit are significant factors of ANP. In addition, the headway, marshalling, type and route setting of trains in urban rail transit determine the transport capacity, which affect ANP. Meanwhile, the layout and capacity of the equipment and facilities at the station are of great importance in determining whether the alighting passengers could evacuate in time, and finally influence ANP.(3) According to the presented methodology, MANP of one-platform-transfer station decreases with the increase of arrival interval of the trains from the two lines under the circumstance of the same headway of two lines. MANP is the largest when the trains from the two lines arrive at the same time, that is662. When the arrival interval increases to30s, MANP decreases by109. But with its further increase, MANP decreases insignificantly.(4) The results of sensitivity analysis illustrate that MANP reduces with the increase in the headway and the rate of transfer in alighting passengers. MANP increases by34with1more minute in headway and by50with0.2more in the rate of transfer in alighting passengers.(5) The simulation results of real-time ANP at one-platform-transfer station prove a comparatively high accuracy of the presented methodology. Some simulation results are somewhat higher than calculation results, which is because the crowding of leaving passenger leads to a decrease in walking speed and an increase in evacuating time.