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A data-driven conceptual framework for understanding the nature of hazards in railway accidents

Author

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  • Hong, Wei-Ting
  • Clifton, Geoffrey
  • Nelson, John D.

Abstract

Hazards threaten railway safety by their potential to trigger railway accidents, resulting in significant costs and impacting the public's willingness to use railways. Whilst many prior works investigate railway hazards, few offer a holistic view of hazards across jurisdictions and time because the large number of primary sources make synthesising such learnings time consuming and potentially incomplete. The conceptual framework HazardMap is developed to overcome this gap, employing open-sourced Natural Language Processing topic modelling for the automated analysis of textual data from Rail Accident Investigation Branch (RAIB), Australian Transport Safety Bureau (ATSB), National Transportation Safety Board (NTSB) and Transportation Safety Board of Canada (TSB) railway accident reports. The topic modelling depicts the relationships between hazards, railway accidents and investigator recommendations and is further extended and integrated with the existing risk theory and epidemiological accident models. The results allow the different aspects of each hazard to be listed along with the potential combinations of hazards that could trigger railway accidents. Better understanding of the aspects of individual hazards and the relationships between hazards and previous accidents can inform more effective hazard mitigation policies including technical or regulatory interventions. A case study of the risk at level crossings is provided to illustrate how HazardMap works with real-world data. This demonstrates a high degree of coverage within the existing risk management system, indicating the capability to better inform policymaking for managing risks. The primary contributions of the framework proposed are to enable a large amount of knowledge accumulated to be summarised for an intuitive policymaking process, and to allow other railway investigators to leverage lessons learnt across jurisdictions and time with limited human intervention. Future research could apply the technique to road, aviation or maritime accidents.

Suggested Citation

  • Hong, Wei-Ting & Clifton, Geoffrey & Nelson, John D., 2024. "A data-driven conceptual framework for understanding the nature of hazards in railway accidents," Transport Policy, Elsevier, vol. 152(C), pages 102-117.
    • Handle: RePEc:eee:trapol:v:152:y:2024:i:c:p:102-117
    DOI: 10.1016/j.tranpol.2024.05.007
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    References listed on IDEAS

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