Abstract
Understanding the nature of rail transit dwell time has potential benefits for both the users and the operators. Crowded passenger trains cause longer dwell times and may prevent some passengers from boarding the first available train that arrives. Actual dwell time and the process of passenger alighting and boarding are interdependent through the sequence of train stops and propagated delays. A comprehensive and feasible dwell time simulation model was developed and optimized to address the problems associated with scheduled timetables. The paper introduces the factors that affect dwell time in urban rail transit systems, including train headway, the process and number of passengers alighting and boarding the train, and the inability of train doors to properly close the first time because of overcrowded vehicles. Finally, based on a time-driven micro-simulation system, Shanghai rail transit Line 8 is used as an example to quantify the feasibility of scheduled dwell times for different stations, directions of travel and time periods, and a proposed dwell time during peak hours in several crowded stations is presented according to the simulation results.
Highlights
Rail transit transport plays a crucial role in urban cities
Actual dwell time and the process of passenger alighting and boarding are interdependent through the sequence of train stops and propagated delays
Based on a time-driven micro-simulation system, Shanghai rail transit Line 8 is used as an example to quantify the feasibility of scheduled dwell times for different stations, directions of travel and time periods, and a proposed dwell time during peak hours in several crowded stations is presented according to the simulation results
Summary
Rail transit transport plays a crucial role in urban cities. With the rapid development of rail transit lines in China, passenger volume has quickly increased. Because of the limited capacity of facilities and the lack of rolling stocks, various rail transit lines in Shanghai ( in Beijing, Guangzhou and other cities in China) are operating close to maximum capacity, and the trains are overcrowded with passengers during peak periods. This phenomenon, where passengers are unable to board the first arriving train with a high load factor, often occurs in these cities.
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