平面环行交叉路口交通流的研究

从道路结构出发，对具有内、外环道的平面环形交叉路口建立了具有多个道路瓶颈的元胞自动机模型，对平面环行交叉路口的交通流进行研究.计算机模拟结果表明，环形交叉路口的内环道中与入环车道接壤处是最容易发生阻塞的地方，内环道中车辆之间的非线性相互作用的效应随刹车概率的增大而增强，流量随之减小；而转向概率的增加有助于提高系统交通流量. 关键词： 平面环形交叉路口 元胞自动机模型 瓶颈 自组织

Study of the grade roundabout crossing

In this paper，a cellular automaton model is proposed to describe the traffic flow at the grade roundabout crossing with the inner roundabout lane and the outer roundabout lane. Simulation results show that the traffic jam appears evidently at the intersection of the inner roundabout lane and the entering lane. The effect of the nonlinear reciprocity of the vehicle in the inner roundabout lane increases and the flux decreases with the increase of the deceleration probability. The flux of the system is improved by the increase of the turning probability.