Abstract
In a bus line with high passenger demand, the stop-skipping operation can benefit both users and operators as well as improve the service level of bus line, but it usually cannot be effectively adopted by operators because of the unordered operation of buses and the discomfort of waiting passenger at stops. Therefore, the stop-skipping operation requires higher reliability for stop serving. This paper proposes a reliable stop-skipping service design with holding strategy by taking into account bus capacity constraints. Under a stop-skipping service, the holding strategy is used to balance the interval of stop serving rather than the headway of buses. Meanwhile, to reflect the actual boarding process of waiting passengers, the number of left-over passengers and the waiting time are calculated during serving time and holding time, respectively. The objective function is to minimize the total costs of bus operation system. Besides, a Genetic Algorithm combined with Monte Carlo Simulation method is defined and implemented to solve the reliability optimization model. Finally, a numerical example based on a bus route in Changchun city is carried out to test the reliability optimization model. Results showed that the reliability optimization strategy can improve the stability of stop service and then save cost of passengers’ travel time.
Highlights
In public transit systems, the frequency setting is usually used to change the service level of a bus line which means that high frequency means high level
Objectives and Contributions. e objective of this study is to propose a model to design a reliable strategy for stopskipping bus operation on a fixed route, considering the boarding process of waiting passengers with bus capacity constraints
It can be seen that, in terms of optimization of total costs, the stopskipping bus operation can effectively reduce the total costs of operation system, while the strategy with holding control has a more obvious effect
Summary
The frequency setting is usually used to change the service level of a bus line which means that high frequency means high level. The frequency setting may not reach good effect because of the different and unbalanced distribution of the passenger demand at each stop along the bus line [1]. Erefore, the stop-skipping strategies are used to deal with the unbalanced passenger demand distribution so as to provide different service frequencies at each stop. Under the stop-skipping strategy, buses serve the high-demand stops, in which passengers get aboard the bus and skip the low-demand stops. Because of the differentiation of stop serving, the stop-skipping bus operation can reduce the waiting time and travel time of passengers at stops with high demand. In the limited transportation capacity, the stop-skipping operation is conducive to the improvement of serving level of transit system
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