考虑驾驶员特性的一维元胞自动机交通流模型

在一维元胞自动机交通流WWH模型和SDNaSch模型的基础上，建立了一种考虑驾驶员特性的元胞自动机交通流模型(Driver-SDNaSch模型).该模型将驾驶员分为激进型、保守型和中立型三类，根据其不同的驾驶特性制定了各自的演化规则，并以此对其进行状态更新；同时考虑了前车速度为0的情况，引入安全减速概率.通过计算机对Driver-SDNaSch模型进行模拟，给出了由三类驾驶员按不同比例组成的混合交通流的速度-密度图和流量-密度图，并对此类混合交通流的特性进行了分析和讨论.与NaSch模型和SDNaSch模 关键词： 交通流 元胞自动机 驾驶员特性 计算机数值模拟

One-dimensional cellular automaton model of traffic flow considering drivers features

Based on the WWH model and SDNaSch model for one-dimensional cellular automaton traffic flow, a Driver-SDNaSch model considering the drivers′ features is established. In this model, drivers are classified into such three types as aggressive, cautious and neutral, and their states are updated following their respective evolution rules, which are made according to the different driving features of these three types. In addition, the safe deceleration probability is introduced when considering the condition of having a stationary vehicle ahead. By using the computer numerical simulation of the Driver-SDNaSch model, the velocity-density and flow-density diagrams of the mixed traffic flow, whose features are also analysed and discussed, with the three types of drivers in different proportions, are presented. The Driver-SDNaSch model, compared with the NaSch model and SDNaSch model, is believed to further reduce the traffic jams so as to increase the traffic capacity.