Abstract
As metro systems are becoming more and more widely used, all kinds of emergencies happen from time to time. A series of cases indicate that inefficient emergency response is a dominating cause of tremendous casualties and losses. The fast and valid allocation of emergency resources after the occurrence of metro emergencies has become a key point in improving the sustainability of metro operations. However, few studies have attempted to determine the allocation of emergency resources in metro emergencies. In this study, considering the unpredictability of different emergency scenarios in the metro system, the scenario-response mode was applied in the resource allocation decision. In this mode, a metro emergency scenario framework was first constructed through the identification of metro emergency elements. Next, a multi-objective model was established for the allocation of emergency resources in the metro emergency rescue process using a scenario-based analysis. The model aims to minimize both the penalty costs due to delays and the sum of allocation costs. The particle swarm optimization algorithm was adopted to solve the model. Eventually, a fire accident scenario at Nanjing Metro was applied to verify the feasibility and validity of the presented model and algorithm. The research results not only enrich and improve metro emergency management theoretically, but also enhance metro emergency rescue ability in practice.
Highlights
As an increasingly important vehicle in the city, metro is becoming one of the paramount symbols of a city’s development and prosperity
There are few existing studies focused on the emergency resource allocation of the metro system
Previous research has established different mathematical models. These studies ignore that the emergency resource allocation may be affected by accident types, passenger volume, and other factors of the metro system, which is full of uncertainty
Summary
As an increasingly important vehicle in the city, metro is becoming one of the paramount symbols of a city’s development and prosperity. Extensive metro transit networks were constructed in major cities all over the world [1]. As of 2018, metro lines had spread across 179 cities, with a total length of 14,219.36 km and more than 10,631 stations [2]. Accidents occur during the operation of metro systems from time to time, hindering the sustainable development of society. A Moscow metro came to a screeching halt and derailed after receiving an incorrect signal in 2014, leaving 23 people killed and 160 injured. In 2016, a fire broke out at Ginza station of the Tokyo Metro during morning rush hours, causing the stagnation of 68,000 people. The variety of emergencies that have occurred shows that the accident rate of metro systems is high, and the harm that occurs is enormous due to the complexity of metro systems and the characteristics of their running circumstances
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