Impact Analysis of Headway Distributions on Single-Lane Roundabout Entry Capacity

Ren,L.; Qu,X.

Journal of Engineering, Project, and Production Management, 2016, 6(1), 2-12

Impact Analysis of Headway Distributions on Single-Lane Roundabout Entry Capacity

Liang Ren¹and Xiaobo Qu²

¹PhD Candidate, Griffith School of Engineering, Griffith University, Room 2.24, G39, Griffith School of Engineering, Griffith University, Gold Coast, 4222 Australia, E-mail: l.ren@griffith.edu.au

²Senior Lecturer, Griffith School of Engineering, Griffith University, Room 1.17, G09, Griffith School of Engineering, Griffith University, Gold Coast, 4222 Australia, E-mail: x.qu@griffith.edu.au (corresponding author).

Engineering Management

Best Paper of EPPM2015 Conference

Received November 18, 2015; received revision December 13, 2015; accepted December 18, 2015

Available online January 16, 2016

Abstract: Based on observed data, this paper evaluates the performance of capacity estimation for single-lane roundabouts using the Highway Capacity Manual (HCM) 2000 model. In this study, the HCM 2000 model is indicated to be over- or under estimate roundabout entry capacity. This is because the HCM 2000 model estimates capacity using an unfit assumption of headway distribution type. According to this finding, we propose a modified model to adjust the HCM 2000 model. Based on a comparison study, the modified model produces smaller relative error (0.92) and root-mean-square deviation (12.79) than the HCM 2000 model (4.66 and 48.17, respectively). It is believe that the modified HCM 2000 model outperforms the HCM 2000 model.

Keywords: Headway distribution type analysis, modified HCM 2000 model, roundabout entry capacity.

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Citation: Ren, L. and Qu, X. (2016). Impact Analysis of Headway Distributions on Single-Lane Roundabout Entry Capacity. Journal of Engineering, Project, and Production Management, 6(1), 2-12.

DOI: 10.32738/JEPPM.201601.0002

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