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Measures of Functional Reliability of Two-Lane Highways

Author

Listed:
  • Krzysztof Ostrowski

    (The Faculty of Civil Engineering, Cracow University of Technology, Warszawska 24 Street, 31-155 Cracow, Poland)

  • Marcin Budzynski

    (The Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Narutowicza 11 Street, 80-233 Gdansk, Poland)

Abstract

Rural two-lane highways are the most common road type both in Poland and globally. In terms of kilometres, their length is by far greater than that of motorways and expressways. They are roads of one carriageway for each direction, which makes the overtaking of slower vehicles possible only when there is a gap in the stream of traffic moving from the opposite direction. Motorways and express roads are dual carriageways that are expected to support high speed travel mainly over long distances. Express roads have somewhat lower technical parameters and a lower speed limit than motorways. Two-lane highways are used for both short- and long-distance travel. The paper presents selected studies conducted in Poland in 2016–2018 on rural two-lane highways and focuses on the context of the need for their reliability. The research was carried out on selected short and longer road sections located in various surroundings, grouped in terms of curvature change rate CCR, longitudinal slopes and cross-sections (width of lanes and shoulders). The studies of traffic volumes, travel time and travel speed, as well as traffic density, will be used to analyze traffic performance and identify measures of travel time reliability. The analyzed roads were characterized by good technical parameters and significant variability of traffic volume throughout the day, week and year. Some roads experience congestion, i.e., situations in which traffic volume Q is close to or above respective road capacity C . In order to determine the form of the suitable reliability measures, it will be important to determine the extent to which a road’s geometric and traffic characteristics impact travel speed and time. The paper presents well-known reliability measures for dual carriageways and proposes new measures, along with an evaluation of their usefulness in the assessment of the functioning of two-lane highways.

Suggested Citation

  • Krzysztof Ostrowski & Marcin Budzynski, 2021. "Measures of Functional Reliability of Two-Lane Highways," Energies, MDPI, vol. 14(15), pages 1-20, July.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:15:p:4577-:d:603585
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    References listed on IDEAS

    as
    1. Nicholson, Alan, 2015. "Travel time reliability benefits: Allowing for correlation," Research in Transportation Economics, Elsevier, vol. 49(C), pages 14-21.
    2. Xiangqin Hou & Yihuan Wang & Peng Zhang & Guojin Qin, 2019. "Non-Probabilistic Time-Varying Reliability-Based Analysis of Corroded Pipelines Considering the Interaction of Multiple Uncertainty Variables," Energies, MDPI, vol. 12(10), pages 1-18, May.
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    Cited by:

    1. Marek Guzek & Rafał S. Jurecki & Wojciech Wach, 2022. "Vehicle and Traffic Safety," Energies, MDPI, vol. 15(13), pages 1-4, June.
    2. Tomasz Krukowicz & Krzysztof Firląg & Józef Suda & Mirosław Czerliński, 2021. "Analysis of the Impact of Countdown Signal Timers on Driving Behavior and Road Safety," Energies, MDPI, vol. 14(21), pages 1-33, October.

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