For an integrated public transport system, metro feeder buses become a key commuter transport mode connecting the suburban residential center and main transit lines in many Chinese mega cities. As the feeder bus is usually operated at a lower frequency relative to the metro, the transfer impedance may be restrained. In this study, we attempt to design a timetable for a metro feeder bus route. Two timetable designs - static and dynamic - are proposed. In the static timetable design, it is assumed that the metro train service is frequent and maintains an even headway, while the feeder bus service is infrequent and the bus headway is an integer multiple of the metro train headway. The bus headway is determined based on the fleet size (and or bus round trip time) constraint. Furthermore, considering that metro and bus arrival times are deterministic, the offset between metro train arrival and bus departure times is set to be equal to transfer walk time. The dynamic design approach considers the static timetable and further improves on it to minimize transfer wait time based on average weekly train specific transfer volume data. The dynamic design problem is solved by the proposed algorithm which can transform multi-variable, unconstrained optimization into a sequence of single variable search.
Transfer Scheduling for Metro-Bus Integration in Mega Cities
14th COTA International Conference of Transportation Professionals ; 2014 ; Changsha, China
CICTP 2014 ; 1465-1478
2014-06-24
Conference paper
Electronic Resource
English
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