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Evaluation of the Influence of Road Geometry on Overtaking Cyclists on Two-Lane Rural Roads

Author

Listed:
  • Griselda López

    (Highway Engineering Research Group, Universitat Politècnica de València, Cami de Vera sn, 46022 Valencia, Spain)

  • Sara Moll

    (Highway Engineering Research Group, Universitat Politècnica de València, Cami de Vera sn, 46022 Valencia, Spain)

  • Ana María Pérez-Zuriaga

    (Highway Engineering Research Group, Universitat Politècnica de València, Cami de Vera sn, 46022 Valencia, Spain)

  • Alfredo García

    (Highway Engineering Research Group, Universitat Politècnica de València, Cami de Vera sn, 46022 Valencia, Spain)

Abstract

Road cycling, both individually and in groups, is common in Spain, where most two-lane rural roads have no cycle lanes. Due to this, and the difference in speed between drivers and cyclists, the overtaking manoeuvre is one of the most dangerous interactions. This study analyses how road geometry influences the overtaking manoeuvre performance. Field data of 1355 overtaking manoeuvres were collected using instrumented bicycles, riding along different rural road segments, and considering individual, medium and large groups of cyclists. The safety variables that characterise the overtaking manoeuvre are overtaking vehicle speed and lateral clearance. These variables have been correlated to geometric characteristics of the road, such as the type of centre line, the horizontal alignment, the speed limit, and the road cross section. Regression models have been fitted considering each cyclist group size and configuration. For individuals and medium groups, wider roads generate higher lateral clearances and lower overtaking speeds, while for large groups only the solid centre line was significant, generating lower clearances and higher speeds. Results suggest that other factors need to be considered, especially for large groups. Results offer a deeper understanding of the phenomenon by providing key points for improving road geometry design, such as widening the shoulders.

Suggested Citation

  • Griselda López & Sara Moll & Ana María Pérez-Zuriaga & Alfredo García, 2022. "Evaluation of the Influence of Road Geometry on Overtaking Cyclists on Two-Lane Rural Roads," IJERPH, MDPI, vol. 19(15), pages 1-14, July.
  • Handle: RePEc:gam:jijerp:v:19:y:2022:i:15:p:9302-:d:875612
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    References listed on IDEAS

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    1. Trenchard, Hugh & Richardson, Ashlin & Ratamero, Erick & Perc, Matjaž, 2014. "Collective behavior and the identification of phases in bicycle pelotons," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 405(C), pages 92-103.
    2. Ana María Pérez-Zuriaga & Sara Moll & Griselda López & Alfredo García, 2021. "Driver Behavior When Overtaking Cyclists Riding in Different Group Configurations on Two-Lane Rural Roads," IJERPH, MDPI, vol. 18(23), pages 1-18, December.
    3. Elisabeth Rubie & Narelle Haworth & Divera Twisk & Naohide Yamamoto, 2020. "Influences on lateral passing distance when motor vehicles overtake bicycles: a systematic literature review," Transport Reviews, Taylor & Francis Journals, vol. 40(6), pages 754-773, November.
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