Study of unique merging behavior under mixed traffic conditions |
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| Institution: | 1. Transportation Research Institute, Technion – Israel Institute of Technology, Haifa 32000, Israel;2. Transportation Engineering Division, Indian Institute of Technology Madras, Chennai 600 036, India;3. Department of Civil Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore 575 025, India;1. Beijing Key Laboratory for Cooperative Vehicle Infrastructure Systems and Safety Control, Beihang University, Beijing 100191, China;2. Beijing Transportation Research Center, Beijing 100073, China;1. Department of Civil and Environment Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA;2. Faculty of Civil and Geospatial Engineering, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the Netherlands;3. School of Information Engineering, Chang’an University, Xi’an, Shanxi 710064, China;1. Dept. of Civil and Environmental Engineering, Univ. of Florida, 365 Weil Hall, P.O. Box 116580, Gainesville, FL 32611-6580, United States;2. Norfolk Southern Corp., 1200 Peachtree St NE, Atlanta, GA 30309, United States;3. Dept. of Civil and Coastal Engineering, Univ. of Florida, 365 Weil Hall, P.O. Box 116580, Gainesville, FL 32611-6580, United States;1. Jiangsu Key Laboratory of Urban ITS, Jiangsu Province Collaborative Innovation Center of Modern Urban, Traffic Technologies, School of Transportation, Southeast University, Nanjing 210096, China;2. Research Centre for Integrated Transport Innovation (rCITI), School of Civil and Environmental Engineering, University of New South Wales (UNSW) Sydney, NSW 2052, Australia |
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| Abstract: | Roads in developing countries carry mixed traffic with wide variations in static and dynamic characteristics of vehicles. The traffic flow is also generally devoid of lane discipline, with vehicles occupying any available road space ahead. In such a regime of traffic flow, the phenomena of merging of vehicles at intersections of two roads is complex, warranting further study. The merging maneuvers at T-intersections under congested traffic conditions were studied microscopically through video-recording. In congested situations, the merging vehicle attempts a complex merging maneuver to enter the main traffic stream. Two unique merging processes are commonly observed in mixed traffic: group and vehicle cover merging (these are generally not observed in countries such as US). The author is using these words first time in this study. These reflect the different types of driver behavior – merging in groups, and by taking cover of another vehicle. Probabilistic models for group and vehicle cover merging are developed that capture this unique merging behavior. Comprehensive microscopic data collection and extraction were carried out to study the merging process at T-intersection under congested conditions. Merging models were then estimated using maximum likelihood method with disaggregate data that was collected for a case study T-intersection in Chennai city, India. Such models can find applications in simulation of highly congested traffic flow in a realistic manner under mixed traffic conditions. They can also give insights on devising better traffic control measures at such intersections. |
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| Keywords: | Mixed traffic flow Group merging Vehicle covered merging Non-lane based movements Traffic simulation |
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