Abstract:

Cross- line operation for an urban rail transit system can reduce passenger transfer time and increase the utilization of resources. In this paper, a capacity allocation model is formulated with the objective of minimizing the costs of use of rolling stock, train operating costs and passenger travel costs. The model takes into account the impact of cross-line trains on carrying capacity of rail lines and is constrained by departure interval, full-load rate and number of available rolling stock. Combining with a case study, we further put forward the necessary conditions to successfully deploy cross-line operations. The research results indicate that to deploy the cross- line operation requires redundant capacity and the successful outcome largely depends on a number of factors such as the passenger flow intensity for transfer, the transfer condition and the train schedule, etc. Although it is easy to achieve cross- line operation for one- platform interchange stations, its effect does not improve significantly in rush hour due to limitation of carrying capacity and corresponding transfer time. Compared with the plan of single-line independent operation, crossline operation can reduce the operating costs and passenger travel costs. Furthermore, the advantages becomes more obvious with the increase of the cross-line passenger flow intensity.

Key words: urban traffic, cross-line, capacity, multi-objective optimization modal, train plan

摘要：

城轨跨线运营可减少乘客换乘，提高资源利用率.本文以企业车辆使用成本，列车运营成本和乘客出行成本最小为目标，考虑跨线列车对线路通过能力的影响，以列车发车间隔、满载率、可用车辆数为约束，构建跨线运营模式下的运力配置模型，结合算例提出判定跨线运营模式适用的必要条件.研究表明，实施跨线运营线路需具备一定的冗余能力，其实施效果依赖于跨线客流强度、接轨站的换乘条件、行车组织等多个因素；同台换乘易实现跨线运营，因线路通过能力和可节省的换乘时间都有限，高峰期实施跨线运营优势并不明显；与单线独立运营开行方案相比，实施跨线运营可减少企业运营成本和乘客出行成本，且随着跨线客流强度的增加，成本节约效益越明显.

关键词: 城市交通, 跨线, 通过能力, 多目标优化模型, 开行方案