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摘要: 基于城市道路交通的拥挤和阻塞主要表现在若干个交叉路口的事实, 提出了以四交叉路口为对象的交通引导仿真系统模型框架, 并讨论了实际选取交叉路口应考虑的三个方面的因素。如果把每个交叉路口的车流看作排队事件, 不同交叉路口的车流事件会发生冲突。轮询各个交叉路口的车流排队事件, 用事件驱动状态转移与专家系统技术相结合的方法来疏解事件冲突, 做出调整交通引导的决策。同时给出了仿真系统模型的目标、功能以及交叉口、车道、信号相位、信号周期等系统状态的描述Abstract: The urban road traffic jam mainly occures at some representive intersections.The paper brings forward the traffic guiding simulation system model framework in which four intersections are taken into account as the objects.The factors that affect the choosing of intersection are discussed.If the traffic flow at each intersection is regarded as queue affair, the conflict should take place between the traffic flows at different intersections.The expert system polls the traffic flow queue affairs at the intersections one by one by combing the event driven state transfer with expert system technology to resolve the affairs conflicts.Meanwhile, the objectives and functions of simulation system modeling, and system state such as intersections, lanes, phases and cycle length are described.
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Key words:
- simulation /
- four intersections /
- traffic guide /
- expert system
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图 1 专家系统对仿真系统的支持示意图
Figure 1. The sketch map of simulation system supported by expert system
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