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在经典NaSch模型的基础上,考虑行驶弯道的曲率半径、弧长以及路面的摩擦系数等对车辆运行的影响,提出一种改进的适应特殊路况的单车道元胞自动机模型.按此模型,通过计算机数值模拟,研究了具有不同曲率半径、不同弧长和不同摩擦系数的弯道对交通流的影响.模拟结果显示,改进后的模型能准确反映特殊路况对行驶车辆的影响,同时再现了与实际交通相一致的时停时走交通波等复杂的非线性现象,根据所反映出的实际交通现象,分析得出了增大弯道曲率半径和弯道处的摩擦系数,并尽量地减小弯道弧长,可以减少弯道处交通事故的发生,避免交通拥堵的发生,提高道路通行能力.
Based on the classic NaSch model, considering the influence of the radius of curvature, the arc length and the friction coefficient of the road surface on the running of the vehicle, an improved single-lane cellular automaton model for special traffic is proposed. According to this model , The influence of the curve with different radius of curvature, different arc length and different friction coefficient on the traffic flow is studied by computer numerical simulation.The simulation results show that the improved model can accurately reflect the impact of the special road conditions on the traveling vehicle, and meanwhile reproduce According to the actual traffic phenomenon reflected by the actual traffic phenomenon, it is analyzed that increasing the radius of curvature of the curve and the friction coefficient at the curve, and as far as possible Reduce the curve arc length, can reduce traffic accidents at the corner, to avoid the occurrence of traffic jams, improve road capacity.