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车辆的横向偏移现象在现实的交通流中广泛存在,交通瓶颈处的横向偏移现象往往更加显著.车辆间横纵向的运动相互干扰,使得瓶颈交通流组织十分混乱,通行能力受到显著影响.为了研究瓶颈处车辆横纵向行为规律及其对交通流的影响,提出一个考虑横向偏移特征的车辆行为模型:通过引入目标转向角概念,并结合经典优化速度模型,给出了用于描述车辆的横纵向运动规律的运动方程,同时通过分析车辆横向偏移特征,制定了基于车辆行驶状态划分的目标转向角确定规则集.数值模拟结果表明:车辆的横向偏移会对交通流的运行产生影响,在一定的横向偏移反应阈值下,瓶颈处横向干扰于交通流的影响随着密度的增加而增加;同时观察到了实际城市交通瓶颈的宏观及微观现象,验证了模型的有效性.
The phenomenon of lateral displacement of vehicles is widespread in realistic traffic flow, and the lateral displacement at traffic bottleneck tends to be more significant. The transverse and longitudinal movement of vehicles interferes with each other, making bottleneck traffic flow very chaotic and the traffic capacity significantly affected. In order to study the transverse and longitudinal behavior of vehicles at the bottleneck and their impact on traffic flow, a vehicle behavior model considering the characteristics of lateral displacement is proposed. By introducing the concept of target steering angle and combining with the classical optimization speed model, And the rules of target steering angle determination based on vehicle traveling state are established by analyzing the characteristics of lateral displacement of vehicle.The numerical simulation results show that the lateral displacement of vehicles will have an impact on the operation of traffic flow The influence of lateral disturbance on traffic flow at the bottleneck increases with the increase of density at a certain threshold of lateral shift reaction. At the same time, the macroscopic and microscopic phenomena of the actual urban traffic bottleneck are observed, and the validity of the model is verified.