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Shortest hyperpaths in a multimodal hypergraph with real-time information on some transit lines
Transportation Research Part A: Policy and Practice ( IF 6.4 ) Pub Date : 2019-09-27 , DOI: 10.1016/j.tra.2019.09.020
David López , Angélica Lozano

This paper presents an algorithm to find multimodal shortest hyperpaths in a transport system where transit arrival is random (i.e. random-arrival transit system), while real-time information on vehicle arrivals is only available for some lines and modes. When the algorithm is queried, there is a short horizon where real-time information is accurate, and past this the most reliable information for estimating the arrivals is to use a random distribution specific to the lines. This problem occurs frequently in emerging cities where the transit schedules are not maintained. A Combined Real-Time Hypergraph is constructed to model the multimodal transport system where all the public transport modes have random arrivals and real-time information on arrivals is available for some lines of some modes. In order to model the period of time when some lines have real-time information, the composition of the head nodes of hyperarcs changes over time. The algorithm is tested on a real-life transport system where we change the number of lines with available real-time information to assess the performance of the algorithm in different scenarios. We found that incrementing the number of lines with real-time information does not impact the performance.



中文翻译:

多模超图中最短的超路径,在某些公交线路上具有实时信息

本文提出了一种算法,用于在运输到达为随机的运输系统(即随机到达运输系统)中找到多模式最短超路径,而有关车辆到达的实时信息仅适用于某些线路和模式。当查询该算法时,实时信息很准确,因此在很短的时间内,估计到达的最可靠信息是使用特定于线路的随机分布。在没有维护公交时间表的新兴城市中,经常会出现此问题。构建组合实时超图以对多式联运系统建模,在该系统中,所有公共运输模式均具有随机到达,并且某些模式的某些线路可提供有关到达的实时信息。为了建模某些线具有实时信息的时间段,超弧的头节点的组成会随时间而变化。在实际运输系统上测试了该算法,在该系统中,我们使用可用的实时信息更改了行数,以评估该算法在不同情况下的性能。我们发现使用实时信息增加行数不会影响性能。

更新日期:2019-09-27
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