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Development and Comparison of Centralized and Decentralized ATIS Models with Simulation Method  

Kim, Hoe-Kyoung (Geographic Information Science and Technology Group, Oak Ridge National Laboratory)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.10, no.2, 2011 , pp. 1-8 More about this Journal
Abstract
Traffic congestion is a source of significant economic and social costs in urban areas. Intelligent Transportation Systems (ITS) are a promising means to help alleviate congestion by utilizing advanced sensing, computing, and communication technologies. This paper proposes and investigates a basic and advanced ITS framework Advanced Traveler Information System (ATIS) using wireless Vehicle to Roadside (Centralized ATIS model: CA model) and Vehicle to Vehicle (DeCentralized ATIS model: DCA model) communication and assuming an ideal communication environment in the typical $6{\times}6$ urban grid traffic network. Results of this study indicate that an ATIS using wireless communication can save travel time given varying combinations of system characteristics: traffic flow, communication radio range, and penetration ratio. Also, all tested metrics of the CA and DCA models indicate that the system performance of both models is almost identical regardless of varying traffic demand and penetration ratios. Therefore, DCA model can be a reasonable alternative to the fixed infrastructure based ATIS model (CA model).
Keywords
Advanced traveler information system (ATIS); vehicle to roadside communication; vehicle to vehicle communication; automatic incident detection (AID) algorithm; driver behavior model;
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