混合非机动车流的多值元胞机模型模拟研究

采用多值元胞机模型对混合非机动车流进行了建模模拟研究. 混合非机动车流在我国城市交通中主要表现为三轮车和自行车的混合. 针对三轮车和自行车实际尺寸的差异，设定自行车占据一个单位空间，三轮车占据两个单位空间. 模拟结果显示：在三轮车与慢速自行车混合的系统中，三轮车比例和三轮车先行概率不会对系统流量造成影响，而三轮车先行概率只会影响到车辆的平均速度；在三轮车与快速自行车混合的系统中，确定性条件下在自由流区域和堵塞流区域都会出现多分支现象，快速自行车具有慢化概率时多分支现象消失. 关键词： 混合非机动车流 元胞自动机 多分支

Multi-value cellular automata model for mixed non-motorized traffic flow

In this paper, a multi-valued cellular automata model for mixed non-motorized traffic flow is proposed and the simulation results are studied. The mixed non-motorized traffic flow is mainly composed of bicycles and tricycles in Chinese towns. According to the fact that bicycles and tricycles have different sizes, a bicycle is assumed to occupy one unit cell space and a tricycle two units of cell space. The simulation results show that: In the system with slow bicycles and tricycles, the ratio and the first moving probability of tricycles do not affect the flux, however, the first moving probability of tricycles will impact on the average velocity of bicycles and tricycles. In the system with fast bicycles and tricycles, the multiple state effect appears both in free flow and congested flow regions under the deterministic case, and it disappears when the fast bicycles has the randomization effect.