Capacity of U-turn Junction at Midblock Median Opening on Urban Arterial Based on Balancing Volume-to-capacity Ratio

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概要

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• U-turn at midblock median opening is frequently provided in developing countries to facilitate the local access. Movement capacity of such u-turn is of interest for deciding the necessary traffic management. HCM 2010 contains the methodology for u-turn capacity estimation, which is based on gap acceptance theory and assumption of major traffic headway distribution. This research evaluated the gap acceptance capacity model and proposed an adjustment method by v/c balancing. Data collection at a u-turn site was conducted for validation. The results showed that the gap acceptance capacity overestimated the field capacity in case of negative exponential headway distribution and underestimated in case of Erlang-2 headway distribution. The difference in driver behavior when responding to different conflicting headway could explain the situation. The proposed adjustment could provide the estimated capacity closer to the measured field capacity. The method also incorporated the interactions between the u-turn and through traffic streams.

著者

• SANO Kazushi

  Department of Civil and Environmental Engineering Nagaoka University of Technology

• NISHIUCHI Hiroaki

  Department of Civil and Environmental Engineering, Nagaoka University of Technology

• JENJIWATTANAKUL Thakonlaphat

  Department of Civil Engineering, Siam University

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• DYNAMIC MOTORCYCLE UNIT AND MEAN STREAM SPEED UNDER MIXED TRAFFIC CONDITIONS ON URBAN ROADS.
• SUPPLY CHAIN SIMULATION FOR MODELING THE INTERACTIONS IN FREIGHT MOVEMENT
• THE SPEED, FLOW AND HEADWAY ANALYSES OF MOTORCYCLE TRAFFIC
• CHARACTERISTICS OF PASSING AND PAIRED RIDING MANEUVERS OF MOTORCYCLE
• Capacity of U-turn Junction at Midblock Median Opening on Urban Arterial Based on Balancing Volume-to-capacity Ratio

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