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Transport Problems

Silesian University of Technology

Subject: Economics , Transportation , Transportation Science & Technology


eISSN: 2300-861X





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VOLUME 15 , ISSUE 1 (March 2020) > List of articles


Mo'ath ALSHANNAQ / Rana IMAM *

Keywords : operational model; accidents prediction model; roundabouts evaluation; roundabouts safety performance

Citation Information : Transport Problems. Volume 15, Issue 1, Pages 141-152, DOI: https://doi.org/10.21307/tp-2020-013

License : (CC BY 4.0)

Received Date : 05-September-2018 / Accepted: 12-March-2020 / Published Online: 26-March-2020



The use of roundabouts is well recognized for sustaining an efficient and safe intersection. However, the safety results may vary based on the prevailing conditions. Therefore, this study assesses the safety performance of roundabouts in Jordan. This study developed a predictive model by collecting and analyzing all accident records of 12 major urban roundabouts in the country over 3 years. For developing the model, this study employed an accident frequency analysis. The model calculated the rate of accidents and incorporated the geometric and operational characteristics of roundabouts. This was followed by ranking the safety performance of the roundabouts. It was concluded that driver behavior of violating the traffic rules, lack of clear lane markings in the circulating area and inadequate signage at the roundabouts entries are the main causes of roundabout accidents. The research recommends including the developed predictive model in future traffic control and planning studies, for identifying hazardous locations, or for prioritizing roundabout improvements based on safety performance.

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