Automated highway systems and hard-shoulders running: A case study

Marco Guerrieri, Raffaele Mauro

    Risultato della ricerca: Article

    Abstract

    The purpose of this research was to evaluate the increase of capacity of existing motorway resulting from the implementation of relatively new traffic control strategies, as the automated highway systems (AHS) and the hard-shoulder running (HSR). Was examined the Italian motorway A22, belonging to Trans-European Road Network, corridor Helsinki - La Valletta. Many traffic surveys were done (year 2014) in several road sections. For each of them have been carried out the flow diagrams, the traffic flow parameters (capacity C, free flow speed vf,jam density kjam) and the relationship between flow rate of lane (right lane Qright and passing lane Qpass) and total flow rate Qt. The current carriageway capacities are in the range 2.703 veh/h ÷ 3.621 veh/h. To improve the capacity, a hard-shoulder running is planned, in both directions of the A22, for a total length of 128 km. This type of traffic control strategy allows an increase of the capacity up to 35%. Instead, for the hypothesized safety conditions of the platooned automated vehicles, a single lane with an AHS gives rise to a capacity of about 5.500 veh/h (reaction time δ= 0, 1 s).
    Lingua originaleEnglish
    pagine (da-a)11698-11708
    Numero di pagine11
    RivistaJOURNAL OF ENGINEERING AND APPLIED SCIENCES
    Volume11
    Stato di pubblicazionePublished - 2016

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    Intelligent vehicle highway systems
    Traffic control
    Highway systems
    Traffic surveys
    Flow rate

    All Science Journal Classification (ASJC) codes

    • Engineering(all)

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    Automated highway systems and hard-shoulders running: A case study. / Guerrieri, Marco; Mauro, Raffaele.

    In: JOURNAL OF ENGINEERING AND APPLIED SCIENCES, Vol. 11, 2016, pag. 11698-11708.

    Risultato della ricerca: Article

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    abstract = "The purpose of this research was to evaluate the increase of capacity of existing motorway resulting from the implementation of relatively new traffic control strategies, as the automated highway systems (AHS) and the hard-shoulder running (HSR). Was examined the Italian motorway A22, belonging to Trans-European Road Network, corridor Helsinki - La Valletta. Many traffic surveys were done (year 2014) in several road sections. For each of them have been carried out the flow diagrams, the traffic flow parameters (capacity C, free flow speed vf,jam density kjam) and the relationship between flow rate of lane (right lane Qright and passing lane Qpass) and total flow rate Qt. The current carriageway capacities are in the range 2.703 veh/h ÷ 3.621 veh/h. To improve the capacity, a hard-shoulder running is planned, in both directions of the A22, for a total length of 128 km. This type of traffic control strategy allows an increase of the capacity up to 35{\%}. Instead, for the hypothesized safety conditions of the platooned automated vehicles, a single lane with an AHS gives rise to a capacity of about 5.500 veh/h (reaction time δ= 0, 1 s).",
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    AU - Guerrieri, Marco

    AU - Mauro, Raffaele

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    AB - The purpose of this research was to evaluate the increase of capacity of existing motorway resulting from the implementation of relatively new traffic control strategies, as the automated highway systems (AHS) and the hard-shoulder running (HSR). Was examined the Italian motorway A22, belonging to Trans-European Road Network, corridor Helsinki - La Valletta. Many traffic surveys were done (year 2014) in several road sections. For each of them have been carried out the flow diagrams, the traffic flow parameters (capacity C, free flow speed vf,jam density kjam) and the relationship between flow rate of lane (right lane Qright and passing lane Qpass) and total flow rate Qt. The current carriageway capacities are in the range 2.703 veh/h ÷ 3.621 veh/h. To improve the capacity, a hard-shoulder running is planned, in both directions of the A22, for a total length of 128 km. This type of traffic control strategy allows an increase of the capacity up to 35%. Instead, for the hypothesized safety conditions of the platooned automated vehicles, a single lane with an AHS gives rise to a capacity of about 5.500 veh/h (reaction time δ= 0, 1 s).

    KW - Automated highway systems (AHS); Capacity; Hard shoulders running (HSR); Engineering (all)

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