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针对弯道是交通事故多发路段,基于元胞自动机Nagel-Schreckenberg交通流模型(简称NaSch模型),建立包含弯道路段在内的元胞自动机模型。采用数值仿真研究,在开放边界条件下研究了不同弯道曲率半径、弧长、摩擦系数等因素对交通流的影响。数值模拟结果表明,弯道曲率半径、弧长和摩擦系数对交通流的影响都很大,通过增大弯道半径和摩擦系数,减少弯道弧长都可以提高交通流量、平均速度,从而减少交通拥堵、交通事故的发生,提高弯道路段的通行能力。
Aiming at the corner is a traffic accident section, a Cellular Automata model is built based on the Nagel-Schreckenberg traffic flow model (NaSch model). Numerical simulation is used to study the influence of curvature, arc length, friction coefficient and other factors on traffic flow under open boundary conditions. The results of numerical simulation show that the influence of curvature radius, arc length and friction coefficient on traffic flow are great. By increasing curve radius and friction coefficient and decreasing arc length of curve, the traffic flow and average speed can be increased, thus decreasing Traffic congestion, traffic accidents, improve traffic capacity of curved sections.