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Using Microsimulation to Evaluate Safety and Operational Implications of Newer Roundabout Layouts for European Road Networks

Author

Listed:
  • Tullio Giuffrè

    (Faculty of Engineering and Architecture, University of Enna Kore, Viale delle Olimpiadi, 94100 Enna, Italy)

  • Salvatore Trubia

    (Faculty of Engineering and Architecture, University of Enna Kore, Viale delle Olimpiadi, 94100 Enna, Italy)

  • Antonino Canale

    (Faculty of Engineering and Architecture, University of Enna Kore, Viale delle Olimpiadi, 94100 Enna, Italy)

  • Bhagwant Persaud

    (Department of Civil Engineering, Ryerson University, 350 Victoria Street, Toronto, ON M5B2K3, Canada)

Abstract

“Standard” roundabouts, for example those designed in some European countries, can often be characterized by low levels of safety or capacity and a high degree of sustainability. Given the proliferation of newer layouts, it is of interest to explore whether design practices could be improved by capitalizing on the experience gained internationally. Operational aspects of some of these designs have been explored previously, but there is a need to compare both the operational and safety performance of new designs to that of standard roundabouts. The objective of this paper is to evaluate the safety and operational implications of various potential alternatives to the standard roundabouts that proliferate in Europe and elsewhere. Microsimulation is used to simulate traffic operations at roundabout layout alternatives at the same levels of volume to capacity (V/C) ratio and also with the same traffic flow. Operational performance measures include the common level of service parameters, while measures of safety are based initially on time to collision (TTC) values. Threshold values of TTC were then applied in defining conflicts that are used for crash-based safety evaluation by applying crash-conflict models estimated in published research. Interesting insights were revealed, suggesting that the newer layouts should be considered where warranted by cost-benefit considerations.

Suggested Citation

  • Tullio Giuffrè & Salvatore Trubia & Antonino Canale & Bhagwant Persaud, 2017. "Using Microsimulation to Evaluate Safety and Operational Implications of Newer Roundabout Layouts for European Road Networks," Sustainability, MDPI, vol. 9(11), pages 1-13, November.
    • Handle: RePEc:gam:jsusta:v:9:y:2017:i:11:p:2084-:d:118680
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    References listed on IDEAS

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    1. Hagring, Ola, 1998. "A further generalization of Tanner's formula," Transportation Research Part B: Methodological, Elsevier, vol. 32(6), pages 423-429, August.
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    Cited by:

    1. Alessandro Severino & Giuseppina Pappalardo & Salvatore Curto & Salvatore Trubia & Isaac Oyeyemi Olayode, 2021. "Safety Evaluation of Flower Roundabout Considering Autonomous Vehicles Operation," Sustainability, MDPI, vol. 13(18), pages 1-14, September.
    2. Hassan M. Al-Ahmadi & Arshad Jamal & Imran Reza & Khaled J. Assi & Syed Anees Ahmed, 2019. "Using Microscopic Simulation-Based Analysis to Model Driving Behavior: A Case Study of Khobar-Dammam in Saudi Arabia," Sustainability, MDPI, vol. 11(11), pages 1-18, May.
    3. Aleksandra Deluka Tibljaš & Tullio Giuffrè & Sanja Surdonja & Salvatore Trubia, 2018. "Introduction of Autonomous Vehicles: Roundabouts Design and Safety Performance Evaluation," Sustainability, MDPI, vol. 10(4), pages 1-14, April.
    4. Othmane Boualam & Attila Borsos & Csaba Koren & Viktor Nagy, 2022. "Impact of Autonomous Vehicles on Roundabout Capacity," Sustainability, MDPI, vol. 14(4), pages 1-14, February.
    5. Bawan Mahmood & Jalil Kianfar, 2019. "Driver Behavior Models for Heavy Vehicles and Passenger Cars at a Work Zone," Sustainability, MDPI, vol. 11(21), pages 1-15, October.
    6. Vincenzo Gallelli & Rosolino Vaiana, 2019. "Safety Improvements by Converting a Standard Roundabout with Unbalanced Flow Distribution into an Egg Turbo Roundabout: Simulation Approach to a Case Study," Sustainability, MDPI, vol. 11(2), pages 1-13, January.
    7. Irena Ištoka Otković & Barbara Karleuša & Aleksandra Deluka-Tibljaš & Sanja Šurdonja & Mario Marušić, 2021. "Combining Traffic Microsimulation Modeling and Multi-Criteria Analysis for Sustainable Spatial-Traffic Planning," Land, MDPI, vol. 10(7), pages 1-26, June.
    8. Tullio Giuffrè & Anna Granà & Salvatore Trubia, 2021. "Safety Evaluation of Turbo-Roundabouts with and without Internal Traffic Separations Considering Autonomous Vehicles Operation," Sustainability, MDPI, vol. 13(16), pages 1-14, August.
    9. Maria Luisa Tumminello & Elżbieta Macioszek & Anna Granà & Tullio Giuffrè, 2023. "A Methodological Framework to Assess Road Infrastructure Safety and Performance Efficiency in the Transition toward Cooperative Driving," Sustainability, MDPI, vol. 15(12), pages 1-20, June.
    10. Mehrzad Hasanvand & Amir Saman Abdollahzadeh Nasiri & Omid Rahmani & Khaled Shaaban & Hossein Samadi, 2023. "A Conflict-Based Safety Diagnosis of SCI Roundabouts Using a Surrogate Safety Measure Model," Sustainability, MDPI, vol. 15(17), pages 1-19, September.
    11. Elżbieta Macioszek, 2020. "Roundabout Entry Capacity Calculation—A Case Study Based on Roundabouts in Tokyo, Japan, and Tokyo Surroundings," Sustainability, MDPI, vol. 12(4), pages 1-21, February.

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