基于运行图的轨道交通网络动态可达性研究

Dynamic Accessibility of Urban Mass Transit Network Based on Train Diagram

网络各站之间的可达性特别是首末班车可达性衔接方案的生成和发布,对提升城市轨道交通智能化管理水平具有重要意义.OD(起讫点)之间动态可达性,主要依赖于城市轨道交通物理网络和列车运行网络,需综合考虑列车运行图的刚性控制和乘客换乘走行的柔性影响.根据弹性换乘时间,定义完全可达、条件可达和不可达三个层次,构建网络动态可达性的衔接模型,并提出推算流程.以实际城轨线网为例,确定了某OD对之间的可达时间域,表明该方法的推算结果可作为乘客出行向导的依据.

Accessibility coordination scheme of urban rail transit network especially for the first and last trains plays a significant role in promoting the intelligent management of UMT system. The dynamic accessibility between ODs mainly depends on the physical network as well as train operational network, which effected by determinate control of train diagram and uncertainty of transfer time. The paper sets up a coordination model of first and last trains＇ dynamic accessibility of UMT network, which consists of absolute accessibility,conditional accessibility and inaccessibility levels in terms of elastic transfer time, then gives the calculation procedure. It indicates the results of accessible time domain of first and last trains can be used for passengers＇ trip guide.