Microscopic Simulation Based On Multi-agent Traffic Flow

Traffic problem is an important problem all over the world, it has seriously influenced the society, how to solve it is the key problem people pay attention to, now, "intelligent transportation system", which aims to solve the traffic problem using the advanced science and technology, is becoming the research emphasis in traffic fields. In ITS, traffic simulation system is the most efficient tool in the operation of transportation systems. Through simulate the real world's traffic flow, traffic simulation system can test traffic management strategies, validate traffic control algorithm, help to train new engineer, and so on.Meanwhile, multi-agent system, a new paradigm of computer and distributed artificial intelligence, provides a new way for the research of such complicated systems as urban traffic system. This research develops an agent-based microscopic traffic simulation system, which focus on:? Establish an agent-based three-level model architecture on traffic flow simulation system, which are vehicle agent, segment agent and road network agent. Vehicle agent simulates vehicle's microscopic behavior, while segment agent gather all information throughout the road networks, and road network agent control the transportation systems. Through three parts' coordination and cooperation, the traffic simulation system could model many traffic behaviors from vehicle moving to traffic control strategies.? Re-model the vehicle's lane-changing behavior through the utilization of multi-agent system theory. Analyze compete and cooperate relationship between each vehicle when lane-changing behavior occurs. Also, some manners of cooperation are discussed.? Develop an agent-based traffic simulation software, which implemented in C++ using object-oriented programming, includes road network depict module, vehicle moving module, moving control module, surveillance and record module, etc.? Design patterns are widely used in programming, so various of control modules are not "hard-coded" in the system. By doing so, thesoftware system could be more flexible, extendable and ultimately reusable.