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Evidence-based roadside clear-zone design for mitigating run-off-road and rollover crashes on rural highways in Saudi Arabia

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  • Turki A Alamoudi
  • Saif A Alarifi

Abstract

Saudi Arabia’s rural highway network experiences a high number of severe run-off-road and rollover crashes, yet evidence-based, locally validated roadside clear-zone design guidance remains limited. This study investigates how roadside clear-zone characteristics influence the occurrence and severity of these crashes by integrating statistical analysis of in-depth investigations of multi-fatality crash data with high-fidelity vehicle simulations. An in-depth dataset of 127 multi-fatality crashes (2020–2022) from the National Road Safety Centre was analyzed using binary logistic regression to identify key predictors of run-off-road severity. The final model retained three significant variables: Vehicle Type (odds ratio OR = 0.56 per class increase, p

Suggested Citation

  • Turki A Alamoudi & Saif A Alarifi, 2026. "Evidence-based roadside clear-zone design for mitigating run-off-road and rollover crashes on rural highways in Saudi Arabia," PLOS ONE, Public Library of Science, vol. 21(9), pages 1-16, September.
    • Handle: RePEc:plo:pone00:0357284
    DOI: 10.1371/journal.pone.0357284
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