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Sep 8, 2022
Research on Time Headway Distribution Models at Roundabouts
Authors: Mengtian Xu [email protected], Rui Li [email protected], and Xinyang Zhang [email protected]Author Affiliations
Publication: CICTP 2022
ABSTRACT
Time headway at roundabouts, as one of the important parameters to describe the traffic flow characteristics at roundabouts, is the key to study behavioral characteristics of drivers, delay analysis at roundabouts, safety analysis, traffic capacity calculation, etc. In this paper, according to the actual observation data at signalized roundabouts and unsignalized roundabouts, the change rules of traffic flow and time headway are obtained. Then a mixed headway distribution model is proposed. After chi-square test and data fitting, it is shown that the mixed distribution model can better describe the characteristics of headway distribution at roundabouts. This paper completes some related researches on time headway of roundabouts, which is helpful to study the operation characteristics of traffic flow at roundabouts, and is convenient for delay analysis at roundabouts and design of roundabouts.
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Published online: Sep 8, 2022
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1College of Civil and Transportation Engineering, Hohai Univ., Nanjing, China. Email: [email protected]
2College of Civil and Transportation Engineering, Hohai Univ., Nanjing, China. Email: [email protected]
3College of Civil and Transportation Engineering, Hohai Univ., Nanjing, China. Email: [email protected]
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