双向两车道混合车辆交通流的特性

The traffic flow of two-lane system with vehicle mixing

在NaSch模型的基础上,制订了超车规则,建立了双向两车道混合车辆的元胞自动机交通流模型.用计算机模拟了车道密度对称和不对称两种情况下不同参数的混合车辆交通流,得出了相应的速度、流量与密度关系的基本图.经分析发现,双向两车道混合车辆交通状态可分为快车特性区、准慢车特性区和慢车特性区;两车道上车辆密度的不对称性对交通流有重要的影响.

A cellular automaton model for two-lane traffic with vehicle mixing basing on the Nagel-Schreckenberg （NaSch） model is proposed. With different parameters, we simulated the traffic flow of the two-lane system when the vehicle densities of lanes are equal or different respectively. The fundamental diagrams of the traffic flow are given. According to the analysis, the traffic state could be divided into three regions. The nonsymmetry of car density on two lanes has important influence on the traffic flow.