Investigation On Entry Capacities of Single-lane Roundabouts
Author(s)
Ren, Liang
Qu, Xiaobo
Wang, Shuaian
Guan, Hong
Griffith University Author(s)
Year published
2014
Metadata
Show full item recordAbstract
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 ...
View more >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.
View less >
View more >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.
View less >
Journal Title
Applied Mechanics and Materials
Volume
505-506
Subject
Engineering
Transport engineering