基于Helly跟驰模型标定参数的跟驰行为分析

Analysis of Car Following Behavior Based on Helly Car Following Model Calibration Parameters

参数标定在跟驰模型研究中占有重要地位.利用实验车在实际道路交通环境下采集实验数据,通过数据处理得到跟驰车辆对的行驶轨迹.然后对Helly线性跟驰模型进行标定,并使用Bootstrap方法对标定结果进行可靠性估计.根据模型参数分析了不同行驶状态和驾驶经验的影响,研究表明,减速停车过程中驾驶人的反应时间显著小于加速启动过程;减速停车过程中驾驶人对速度和距离变化的反应更加明显,并且非专业驾驶人的敏感性要高于专业驾驶人.

Parameter calibration occupies an important place in the studies on following model.the experimental data in actual traffic situation are collected based on instrumented vehicle,and the traveling track of the leading vehicles and following vehicles through data processing.Then,the Helly linear car following model is calibrated,and out a reliable estimation of the model parameters calibration results using the Bootstrap method is carried out.At last,the influence of different driving states and experience is analyzed based on model parameters,the study indicates that the driver＇s response time when decelerating is significant less than that when accelerating;In the process of deceleration,the reaction of drivers to the change of the speed and distance is more obvious regardless of driving experience,and non-professional drivers are more sensitive than professional drivers.