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Managed Lane as Strategy for Traffic Flow and Safety: A Case Study of Catania Ring Road

Author

Listed:
  • Salvatore Cafiso

    (Department of Civil Engineering and Architecture, University of Catania, 95123 Catania, Italy)

  • Alessandro Di Graziano

    (Department of Civil Engineering and Architecture, University of Catania, 95123 Catania, Italy)

  • Tullio Giuffrè

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

  • Giuseppina Pappalardo

    (Department of Civil Engineering and Architecture, University of Catania, 95123 Catania, Italy)

  • Alessandro Severino

    (Department of Civil Engineering and Architecture, University of Catania, 95123 Catania, Italy)

Abstract

According to international traffic statistics, the quantity of daily traveling vehicles amounts to one billion, and it is estimated that in 2050 that amount will reach four billion. Urban population is growing especially in large metropolitan areas. This increase has different outgrowths concerning regular circulation, safety, and climatic perspectives. Therefore, the present and further increase of traffic flow is affecting the operational and safety performance of several roadway categories. Urban ring roads belong to a roadway category that is particularly subjected to congestion phenomena, but in many cases, public administrations are unable to afford required expenses to upgrade or build new roadways. Therefore, an intervention is needed that increases the capacity of existing infrastructures with limited cost results to be fundamental. In such a framework, the dynamic use of hard shoulder running (HSR) would represent a valid solution that both exploits existing infrastructures and facilitates traffic outflow by implementation of smart digital roads, with limited interventions on the physical infrastructure. Despite the expected improvements in traffic capacity, the HSR poses safety issues particularly in specific locations (e.g., interchanges) and for the operation of the transition phase for opening and closing the HSR. In this paper, the applicability and usefulness of microsimulation were tested with the Catania (Italy) ring road, as a case study, through the application of VISSIM traffic microsimulation software and SSAM traffic conflict tool, implementing different scenarios for the activation of the HSR.

Suggested Citation

  • Salvatore Cafiso & Alessandro Di Graziano & Tullio Giuffrè & Giuseppina Pappalardo & Alessandro Severino, 2022. "Managed Lane as Strategy for Traffic Flow and Safety: A Case Study of Catania Ring Road," Sustainability, MDPI, vol. 14(5), pages 1-16, March.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:5:p:2915-:d:762635
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    References listed on IDEAS

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    1. Sunil Patil & Mark Burris & W. Douglass Shaw & Sisinnio Concas, 2011. "Variation in the value of travel time savings and its impact on the benefits of managed lanes," Transportation Planning and Technology, Taylor & Francis Journals, vol. 34(6), pages 547-567, June.
    2. Meyer, Michael D., 1999. "Demand management as an element of transportation policy: using carrots and sticks to influence travel behavior," Transportation Research Part A: Policy and Practice, Elsevier, vol. 33(7-8), pages 575-599.
    3. Lisa L. Green & Mark W. Burris & David Florence & Winfred Arthur, 2021. "Psychological items: a useful addition in modeling travel behavior on managed lanes," Transportation, Springer, vol. 48(1), pages 215-237, February.
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    Cited by:

    1. Suzana Tajnik & Blaž Luin, 2022. "Impact of Driver, Vehicle, and Environment on Rural Road Crash Rate," Sustainability, MDPI, vol. 14(23), pages 1-18, November.

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