Study on the influence of regional rail transit line interconnection operation on capacity

摘要

Interconnection operation of rail transit line has become a key means to address the long-distance and diversified travel demands in the rail transit region. The influencing mechanism of the interconnection operation on the capacity of urban rail transit network is complex. In this study, the operation of off-line train is analyzed after interconnection. The capacity is mainly impacted during the stages of transportation scheduling and rescheduling. Three types of off-line train operation modes, namely, running only one off-line train (M-1), continuously running multiple off-line trains (M-2), and operating off-line and in-line trains at a certain proportional interval (M-3), are studied. The methods to reduce the impact on capacity during transportation planning and operation scheduling are put forward. A suburban railway and an urban rail line in Chengdu-Chongqing area are selected as the research cases to verify our research conclusions. We found that the operation of off-line trains has strict requirements on the departure interval of the line. We further found that the mode M-2 is suitable for the lines with tight capacity, and the mode M-3 is suitable for off-peak periods when the transportation capacity is relatively abundant.