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在Nagel Schrekenberg单车道元胞自动机交通流模型的基础上 ,考虑车辆之间的相对运动以及车辆减速概率对交通状态的影响 ,提出了一种改进的单车道元胞自动机交通流模型 .并以该模型进行计算机模拟 ,结果表明 ,在车流状态的演化过程中 ,通过确定减速概率与车辆密度的指数v关系来控制车流量 ,不同的v值车流量不同 ,对车辆运动出现堵塞相的相变点有影响 .当v约为 0 75时 ,模拟结果与实测结果符合 .随着车辆密度的增加 ,车辆的局域聚集程度加大 ,平均速度下降增大 ,将出现不稳定的车辆聚集的堵塞相 .在车辆的运动过程中 ,车流的运动相与堵塞相交替出现 ,非常类似于波的波峰和波谷的传播
Based on the Nagel Schrekenberg single-cell cellular automaton traffic flow model, an improved single-lane cellular automaton traffic flow model is proposed considering the relative motion of vehicles and the influence of vehicle deceleration probability on traffic conditions. The model was used to simulate the vehicle. The results showed that during the evolution of the vehicle flow state, the vehicle flow rate was controlled by determining the relationship between the deceleration probability and the exponential v of the vehicle density. Different traffic values of v- When v is about 0 75, the simulation results are consistent with the measured results.With the increase of vehicle density, the degree of local aggregation of vehicles increases and the average speed decreases and the unstable vehicle aggregation In the process of vehicle movement, the movement of traffic flow alternates with that of traffic jam, which is very similar to the wave peak and trough propagation