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Uncertainty-based prioritization of road safety projects: An application of data envelopment analysis

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  • Sadeghi, Aliasghar
  • Mohammadzadeh Moghaddam, Abolfazl

Abstract

The use of ranking methods in safety retrofit projects, in order to reduce uncertainty to an acceptable level, is a crucial problem. This paper presents a multidimensional method for prioritizing safety retrofit projects, in which uncertainty is taken into account in benefits estimation (accident reduction) and costs. Data Envelopment Analysis (DEA) with uncertainty assessment is described to help decision makers select the most cost effective projects. It is different from other ranking methods in that this approach adds standard errors of crash modification factor and crash costs in selecting process as well as the average values. Furthermore, this model is applied to a sample of intersections that are required to improve safety. Results have revealed that the proposed model is a suitable tool in selecting efficient projects when tolerances in accident reductions and project cost are incorporated. Comparative study between the proposed model and incremental benefit cost analysis and integer programming methods has also indicated that some changes in the list of selected projects considering the uncertainty impacts of data were observed. This analysis allows such safety projects to be identified. This also provides more complete information for safety analysts to allocate a limit budget to more efficient safety projects.

Suggested Citation

  • Sadeghi, Aliasghar & Mohammadzadeh Moghaddam, Abolfazl, 2016. "Uncertainty-based prioritization of road safety projects: An application of data envelopment analysis," Transport Policy, Elsevier, vol. 52(C), pages 28-36.
    • Handle: RePEc:eee:trapol:v:52:y:2016:i:c:p:28-36
    DOI: 10.1016/j.tranpol.2016.07.003
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    References listed on IDEAS

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    5. Hermans, Elke & Van den Bossche, Filip & Wets, Geert, 2009. "Uncertainty assessment of the road safety index," Reliability Engineering and System Safety, Elsevier, vol. 94(7), pages 1220-1228.
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    Cited by:

    1. Sadeghi, Aliasghar & Farhad, Hamid & Mohammadzadeh Moghaddam, Abolfazl & Jalili Qazizadeh, Morteza, 2018. "Identification of accident-prone sections in roadways with incomplete and uncertain inspection-based information: A distributed hazard index based on evidential reasoning approach," Reliability Engineering and System Safety, Elsevier, vol. 178(C), pages 278-289.
    2. Behnood, Hamid Reza, 2018. "Best practice analysis of action for road safety in Iran amongst the leading developing countries using an optimized success indicator," Transport Policy, Elsevier, vol. 66(C), pages 76-84.

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