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  • Investigation On Entry Capacities of Single-lane Roundabouts

    Author(s)
    Ren, Liang
    Qu, Xiaobo
    Wang, Shuaian
    Guan, Hong
    Griffith University Author(s)
    Guan, Hong
    Ren, Liang
    Qu, Xiaobo
    Year published
    2014
    Metadata
    Show full item record
    Abstract
    Both heavy goods vehicles (HGV) and exiting vehicles can significantly affect the entry capacity of a roundabout. However, their effects have not been taken into account in HCM 2000 model. Recently two studies have been carried out to address this issue: 1) Dahl and Lee (2012) proposed an expectation theory based approach to incorporate the effect of HGVs [; and 2) Qu et al. (2013) derived a new roundabout capacity model by assuming that each exiting vehicle could provide one entry opportunity for waiting vehicles [. In this paper, the two models are integrated using a scenario-based approach to analyse the effects of not ...
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    Both heavy goods vehicles (HGV) and exiting vehicles can significantly affect the entry capacity of a roundabout. However, their effects have not been taken into account in HCM 2000 model. Recently two studies have been carried out to address this issue: 1) Dahl and Lee (2012) proposed an expectation theory based approach to incorporate the effect of HGVs [; and 2) Qu et al. (2013) derived a new roundabout capacity model by assuming that each exiting vehicle could provide one entry opportunity for waiting vehicles [. In this paper, the two models are integrated using a scenario-based approach to analyse the effects of not only exiting vehicles but also HGVs. A comparative study indicates that HCM 2000 model performs well under low to mid traffic conditions while it underestimates the capacities under high traffic conditions in combination with high proportions of exiting vehicles.
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    Journal Title
    Applied Mechanics and Materials
    Volume
    505-506
    DOI
    https://doi.org/10.4028/www.scientific.net/AMM.505-506.497
    Subject
    Engineering
    Transport engineering
    Publication URI
    http://hdl.handle.net/10072/61916
    Collection
    • Journal articles

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