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利用多车道元胞自动机模型研究双下匝道系统的交通流动态演化特征.采用可变情报板来实现交通诱导,着重分析驾驶员选择目标匝道的决策行为及其对道路通行能力的影响.分别建立了无可变情报板的基本模型和有可变情报板的诱导模型.通过数值模拟,分别给出了相应的相图、道路通行能力、流量图和时空斑图,分析了进车概率、出车比例和出车道长度对交通行为的影响.通过对两个模型模拟结果的比较分析,发现当出车道长度较小而进车概率、出车比例都较大时,可变情报板的诱导信息能明显提高下游匝道的利用率,改善道路交通流状况,从而缓解交通拥堵.
The multi-lane cellular automaton model is used to study the dynamic evolution of traffic flow in the double-ramp system. The variable intelligence board is used to achieve traffic guidance. The decision-making behavior of the driver selecting the target ramp and its influence on road capacity are analyzed respectively The basic model without variable information board and the inductive model with variable information board are established.The corresponding phase diagram, traffic capacity, traffic flow chart and time-space pattern are given respectively by numerical simulation, Traffic ratio and traffic lane length on traffic behavior.According to the comparison and analysis of the simulation results of two models, it is found that when the lane length is smaller and the probability of getting into the car is larger, the induction board can be induced Information can significantly improve the utilization of downstream ramps and improve traffic conditions in the roads to ease traffic congestion.