考虑前方交通状态的车辆跟驰模型与数值仿真

为了描述复杂环境下多车跟驰的驾驶行为特性,在全速度差模型的基础上引入前方交通状态的影响参数建立车辆跟驰模型.采用交通流密度作为定量衡量前方交通状态的关键指标,通过线性稳定性分析得到模型的临界稳定性条件.提出以加速度干扰指标作为衡量交通运行稳定性和乘客舒适度的定量指标.理论分析和数值仿真结果表明,该模型扩大了交通流的稳定性区间,符合实际驾驶行为并能有效提高交通流的稳定性.

Car Following Model and Simulation Considering Front Traffic Situation

In order to describe car following behavior for multiple vehicle following in complex situation,a new car following model is presented by incorporating the effects of front traffic situation and improving the full velocity difference model.Traffic density is described as the key parameter of the front traffic condition.The stability condition of the model is obtained by using the linear stability theory.The term of acceleration disturbance is proposed to measure the stability of traffic and comfort of drivers.The results imply that the stability range of the improved model is obviously larger than previous models and the incorporating of traffic density makes car following behavior realistic and steady.