Some observed queue discharge features at a freeway bottleneck downstream of a merge |
| |
| Institution: | 1. Department of Civil Engineering, Portland State University, P.O. Box 751, Portland, OR 97207-0751, USA;2. Department of Civil and Environmental Engineering and Institute of Transportation Studies, University of California, 109 McLaughlin Hall, Berkeley, CA 94720-1720, USA;1. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore;2. Department of Traffic Accident Expertise, Faculty of Transport and Traffic Sciences, University of Zagreb, Croatia;3. Department of Traffic Signaling, Faculty of Transport and Traffic Sciences, University of Zagreb, Croatia;1. Department of Civil, Structural and Environmental Engineering, Institute for Sustainable Transportation and Logistics, Engineering Statistics and Econometrics Application Research Laboratory, University at Buffalo, The State University of New York, 241 Ketter Hall, Buffalo, NY 14260, USA;2. Department of Civil and Environmental Engineering, University of South Florida, 4202 E Fowler Avenue, ENC 3300, Tampa, FL 33620, USA;1. Jiangsu Key Laboratory of Urban ITS, Southeast University, 2 Si Pai Lou, Nanjing 210096, China;2. Jiangsu Province Collaborative Innovation Center of Modern Urban Traffic Technologies, 2 Si Pai Lou, Nanjing 210096, China;1. Center for Mobility Engineering and Post-graduate Program in Automation and Systems, Federal University of Santa Catarina, Campus Joinville, 89218-000 Joinville, SC, Brazil;2. Dynamic Systems and Simulation Laboratory, Department of Production Engineering and Management, Technical University of Crete, University Campus, 73100 Chania-Crete, Greece |
| |
| Abstract: | Details of traffic evolution were studied upstream and downstream of a freeway bottleneck located near a busy on-ramp. It is shown that on certain days the bottleneck became active upon dissipation of a queue emanating from somewhere further downstream. On such occasions, the bottleneck occurred at a fixed location, approximately one kilometer downstream of the merge. Notably, even after the dissipation of a downstream queue, the discharge flows in the active bottleneck were nearly constant, since the cumulative counts never deviated much from a linear trend. The average bottleneck discharge flows were also reproducible from day to day. The diagnostic tools used in this study were curves of cumulative vehicle arrival number versus time and cumulative occupancy versus time constructed from data measured at neighboring freeway loop detectors. Once suitably transformed, these cumulative curves provided the measurement resolution necessary to observe the transitions between freely flowing and queued conditions and to identify some important traffic features. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
