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The present study focuses on assessing the safety scenario of a two-lane highway network in India and subsequently identifying cost-effective countermeasures to improve the safety situation. For this purpose, five state highways consisting of a total length of 1384 km were selected from the state of West Bengal. Geo-referenced video data capturing the road inventory of the entire network is processed to develop Star Ratings using International Road Assessment Program (iRAP) for four road user groups. The results show that most of the network is rated below three stars. Five major safety issues are also identified: Deficiencies in road delineation, Unprotected roadside hazards, Untreated built-up areas, Improper horizontal alignments, and Safety issues at intersections. Subsequently, the countermeasures most effectively reducing fatalities and serious injuries (FSI) are identified from Safer Road Investment Plan (SRIP) based on the benefit–cost ratio. The outcomes of the present study would be helpful to the stakeholders and policymakers in allocating funds and resources to implement the most-effective countermeasures. Moreover, in developing countries, with limited resources, the results would guide the road-owning agencies to prioritize their areas of investment for enhancing road safety on two-lane highways proactively.

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Identification of Risk Factors and Formulation of Cost-Effective Countermeasure Plans for Two-Lane Highways Using iRAP: A Case Study in West Bengal, India

  • 会议论文

  • 发表日期：

    2025年

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  • Abhishek Chakraborty,
  • Sudipa Chatterjee,
  • Roshan Jose,
  • Dipanjan Mukherjee,
  • Nabanita Roy,
  • Sudeshna Mitra

摘要

The present study focuses on assessing the safety scenario of a two-lane highway network in India and subsequently identifying cost-effective countermeasures to improve the safety situation. For this purpose, five state highways consisting of a total length of 1384 km were selected from the state of West Bengal. Geo-referenced video data capturing the road inventory of the entire network is processed to develop Star Ratings using International Road Assessment Program (iRAP) for four road user groups. The results show that most of the network is rated below three stars. Five major safety issues are also identified: Deficiencies in road delineation, Unprotected roadside hazards, Untreated built-up areas, Improper horizontal alignments, and Safety issues at intersections. Subsequently, the countermeasures most effectively reducing fatalities and serious injuries (FSI) are identified from Safer Road Investment Plan (SRIP) based on the benefit–cost ratio. The outcomes of the present study would be helpful to the stakeholders and policymakers in allocating funds and resources to implement the most-effective countermeasures. Moreover, in developing countries, with limited resources, the results would guide the road-owning agencies to prioritize their areas of investment for enhancing road safety on two-lane highways proactively.