基于弯道影响的交通流特性研究

A Study on Properties of Traffic Flow Based on Road Turning Impact

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。

For the accident-prone sections of road turning,based on the Nagel-Schreckenberg model（abbreviation NaSch model）,an cellular automaton for road turning is proposed.The traffic flow is investigated by numerical simulation under the open boundary conditions.It is found that the curvature radii,arc length and friction factor have great impact on the traffic flow.The result shows that the flow and average speed can be increased by increasing the curvature radii,friction factor and reducing the arc length of road turning,the congestion and traffic accidents can be decreased and the capacity of the road can be enhanced also.