Vehicle platooning is a promising service, which is a group of vehicles traveling with close spacing in support of vehicle automation technologies and vehicle-to-vehicle (V2V) wireless communications, to enhance the performance of freeway traffic systems. In particular, truck platooning is regarded as an implementable service in the short term in practice. The purpose of this study is to analyze the impact of truck platooning on the freeway capacity based on the simulation experiments. VISSIM was used to simulate mixed traffic conditions consisting of manually driven general vehicles and truck platoons, and simulation outputs were further analyzed to identify the change in capacity when truck platoon was implemented. A total of 160scenarios representing various vehicle platoon operations are evaluated in terms of the increase in the capacity. The largest capacity increase, approximately 17.8% increase, was observed under a scenario where the vehicle platoon size is 2, inter-platoon spacing is 10m, intra-platoon spacing is 50m, and the market penetration rate (MPR) is 10%. The results of this study are expected to be used effectively in developing vehicle platooning management strategies to increase the freeway capacity.
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