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<p>As an important part of the urban transportation system, public transport undertakes the daily travel needs of a large number of urban residents. However, in recent years, the urban road transport network has been widespread interrupted by the frequent occurrence of rainstorm, severely obstructing residents’ normal travel. Therefore, how to use public transportation to organize the evacuation of passengers quickly has become an urgent problem for city managers. In this study, we propose a method to reconstruct the interrupted bus route network, aiming at assisting stranded passengers near waterlogged roads to reach their destination. In this method, it incorporates two evacuation strategies according to the damage degree of the network and the temporal impact of rainfall intensity on road disruption: utilizing the available bus routes to transfer as the priority and generating new bus routes based on the remaining demand. Based on this, three rainstorm scenarios are designed, and the road disruption degree into Levels I, II and III is categorized. Evacuation schemes are matched to the above scenarios. Thus, two models comprising a passenger transfer model and a flexible bus route optimization model are proposed, considering both passenger and enterprise benefits, and a transfer path search algorithm and a hybrid algorithm of genetic algorithm and Dijkstra algorithm are designed to solve the model, respectively. A case study is conducted on a major urban area of Shijiazhuang City, China, in the background of a sudden rainstorm in 2022. The results demonstrate the high efficiency of the proposed method adoption that 78% of the stranded passengers can be evacuated by transfer strategy, while the remaining passengers leave through the flexible bus route strategy. The reconfiguration method effectively improves the overall connectivity level of the interrupted bus route network, achieving a 10.5% increase compared to the pre-optimized route network. Meanwhile, three scenarios are arranged as transfer strategy only, as well as the combination of transfer strategy and flexible bus route strategy. Furthermore, the proposed method also promotes the utilization of out-of-service vehicles and ensures stranded passengers especially in bad weather travel safely and efficiently.</p>

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An optimized bus route network reconfiguration method under interrupted road network induced by rainstorm

  • 期刊论文

  • 发表日期：

    2025年9月15日

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  • Cui-ying Song,
  • Lu Chen,
  • Liang-tao Nie

摘要

As an important part of the urban transportation system, public transport undertakes the daily travel needs of a large number of urban residents. However, in recent years, the urban road transport network has been widespread interrupted by the frequent occurrence of rainstorm, severely obstructing residents’ normal travel. Therefore, how to use public transportation to organize the evacuation of passengers quickly has become an urgent problem for city managers. In this study, we propose a method to reconstruct the interrupted bus route network, aiming at assisting stranded passengers near waterlogged roads to reach their destination. In this method, it incorporates two evacuation strategies according to the damage degree of the network and the temporal impact of rainfall intensity on road disruption: utilizing the available bus routes to transfer as the priority and generating new bus routes based on the remaining demand. Based on this, three rainstorm scenarios are designed, and the road disruption degree into Levels I, II and III is categorized. Evacuation schemes are matched to the above scenarios. Thus, two models comprising a passenger transfer model and a flexible bus route optimization model are proposed, considering both passenger and enterprise benefits, and a transfer path search algorithm and a hybrid algorithm of genetic algorithm and Dijkstra algorithm are designed to solve the model, respectively. A case study is conducted on a major urban area of Shijiazhuang City, China, in the background of a sudden rainstorm in 2022. The results demonstrate the high efficiency of the proposed method adoption that 78% of the stranded passengers can be evacuated by transfer strategy, while the remaining passengers leave through the flexible bus route strategy. The reconfiguration method effectively improves the overall connectivity level of the interrupted bus route network, achieving a 10.5% increase compared to the pre-optimized route network. Meanwhile, three scenarios are arranged as transfer strategy only, as well as the combination of transfer strategy and flexible bus route strategy. Furthermore, the proposed method also promotes the utilization of out-of-service vehicles and ensures stranded passengers especially in bad weather travel safely and efficiently.