Review and Outlook of Roundabout Capacity |
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| Affiliation: | 1. Railway Technical Research Institute, Kokubunji-shi, Tokyo, Japan;2. Asian Growth Research Institute, Kitakyushu, Japan;1. MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology, Beijing Jiaotong University, Beijing 100044, China;2. School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, China;1. University of Coimbra, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal;2. Polytechnic Intitute of Viseu, Campus Politécnico de Represes, 3504-510 Viseu, Portugal;3. School of Technology and Management, Polytechnic Institute of Leiria, Campus 2,Morro da Len –Alto do Vieiro,2411-901 Leiria, Portugal;1. Department of Civil and Environmental Engineering, University of North Carolina at Charlotte, Charlotte 28223, USA;2. Department of Civil and Environmental Engineering, Jackson State University, Jackson 39217, USA;1. Computer Department, Faculty of Engineering, Urmia University, Urmia, Iran;2. Computer Department, Azad university-Shabestar branch, Shabestar, Iran |
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| Abstract: | Capacity is an important part of the operation efficiency at roundabouts. Through analyzing existing capacity models of roundabout, this paper focuses on the problem research principles and methods such as empirical regression model, gap acceptance model and model based on simulation software. The key technologies of modeling are also analyzed. Then the general approaches of modeling roundabout capacity are proposed, combined with some problems easily overlooked in previous study. Determining the interaction mechanism among each traffic flow and considering the significant impact factors, the capacity model is established on the whole. Finally, combing with the control objectives of roundabouts, an outlook is proposed for future studies on roundabout capacity. |
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| Keywords: | traffic engineering roundabout capacity model gap acceptance theory critical gap |
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