改进Newell跟驰模型与实证研究

为了克服Newell跟驰模型单一考虑跟驰车与前导车之间的车间距进行速度优化描述车辆跟驰行为的不足,在同时考虑车间距和速度差对车辆跟驰行为影响的基础上,提出了一种改进Newell跟驰模型。通过对模型进行稳定性分析,得到了模型的稳定性条件。并通过在西安市二环南路西段实地拍摄视频采集得到的数据,对模型的参数进行了标定;最后分别采用上述模型对未来交通流趋势进行仿真预测,通过预测结果与实测数据的对比分析,证实了改进Newell模型的有效性。

Improved Newell car-following model and empirical research

Aim at the shortcoming of Newell car-following model, the paper proposes an improved Newell car-following model on the basis of consideration of both the vehicle distance and speed difference impact, and analyses the stability condition of the model. The parameters of the model are calibrated by the data obtained by shooting video on the western part of Second Ring South Road in Xi"an. Simulations are conducted using the two models to predict the traffic flow future trends. Through the simulation results are compared with the measured data, the validity of the improved Newell car-following model is verified.