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A hybrid system of neural networks and rough sets for road safety performance indicators

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Abstract

Road safety performance indicators are comprehensible tools that provide a better understanding of current safety conditions and can be used to monitor the effect of policy interventions. New insights can be gained in case one road safety index is composed of all risk indicators. The overall safety performance can then be evaluated, and countries ranked. In this paper, a promising structure of neural networks based on decision rules generated by rough sets—is proposed to develop an overall road safety index. This novel hybrid system integrates the ability of neural networks on self-learning and that of rough sets on automatically transforming data into knowledge. By means of simulation, optimal weights are assigned to seven road safety performance indicators. The ranking of 21 European countries in terms of their road safety index scores is compared to a ranking based on the number of road fatalities per million inhabitants. Evaluation results imply the feasibility of this intelligent decision support system and valuable predictive power for the road safety indicators context.

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Authors and Affiliations

  1. Transportation Research Institute, Hasselt University, Wetenschapspark 5 bus 6, 3590, Diepenbeek, Belgium

    Yongjun Shen, Elke Hermans, Da Ruan, Geert Wets, Koen Vanhoof & Tom Brijs

  2. School of Information Science and Technology, Southwest Jiaotong University, Chengdu, 610031, People’s Republic of China

    Tianrui Li

  3. Belgian Nuclear Research Centre (SCK CEN), Boeretang 200, 2400, Mol, Belgium

    Da Ruan

Authors
  1. Yongjun Shen
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  2. Tianrui Li
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  3. Elke Hermans
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  4. Da Ruan
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  5. Geert Wets
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  6. Koen Vanhoof
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  7. Tom Brijs
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Correspondence to Yongjun Shen.

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Shen, Y., Li, T., Hermans, E. et al. A hybrid system of neural networks and rough sets for road safety performance indicators. Soft Comput 14, 1255–1263 (2010). https://doi.org/10.1007/s00500-009-0492-3

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