摘要
城市道路车辆换道研究多数以客车为主,但是货运车辆换道也不容忽视。文章在客车换道元胞自动机模型的基础上,根据货车动力性能和车辆外型特点,考虑货车强制换道至目标车道与不同类型后方车辆的安全距离,建立出入口上游路段货车强制换道元胞自动机模型。采用MATLAB软件数值模拟,结果表明:从时空图中可以看出当货车比例大于0.3时,交通运行状态变得不稳定;速度-密度图较贴合实际交通运行;在本模型和基础换道模型的平均换道次数与密度对比图中,货车比例大于0.3时,换道次数差异越明显。
Most of the research on urban road vehicle lane change is mainly based on passenger cars,but freight vehicle lane change cannot be ignored.Based on the model of passenger car lane changing cell automata,according to the dynamic performance and appearance characteristics of the truck,the model of the forced lane change cell automata of the truck in the upstream section of the entrance and exit is established considering the safe distance between the truck forced lane change to the target lane and different types of rear vehicles.Using the numerical simulation of MATLAB software,the results show that when the proportion of trucks is greater than 0.3,the traffic operation state becomes unstable;the speed-density map is more in line with the actual traffic operation;in the comparison chart of the average number of lane changes and density between this model and the basic lane change model,the more obvious the difference in the number of lane changes when the proportion of trucks is greater than 0.3.
作者
杨晓芳
李楠
YANG Xiaofang;LI Nan(School of Management,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《物流科技》
2023年第21期83-87,共5页
Logistics Sci-Tech
关键词
元胞自动机模型
强制换道
货车
安全间距
cellular automata model
forced lane change
truck
safe spacing
