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为透析换道前驾驶人行为机理,提取可以体现驾驶人换道意图的表征参数,设计真实道路条件下的实车试验,对换道决策机制进行深入研究。基于驾驶人对外界信息的感知特性、判断决策等,分析驾驶人车道变换决策的形成机理。依据换道前驾驶人对后视镜的注视特性确定换道意图时窗,进一步提取驾驶人车道变换意图表征指标。分析表明,换道决策由信息感知及3个判断决策过程复合而成,驾驶人换道意图表征时窗约为5s;后视镜及视野盲区注视频次,当前车道与目标车道的注视时间及注视概率等指标都可以用来有效表征驾驶人的车道变换意图。
In order to analyze the driving behavior of drivers before lane change and extract the characterization parameters that can reflect driver’s intention of lane changing, a real vehicle test under real road conditions is designed to deeply study the lane changing decision mechanism. Based on the driver’s perception of the outside world’s information, decision-making and so on, this paper analyzes the formation mechanism of driver lane change decision. Based on the gaze characteristics of the rearview mirror before the lane change, the lane change intent time window is determined to further extract the driver lane change intent indicator. The analysis shows that the lane change decision is made up of information perception and three decision making processes, and the time window of driver lane changing intention is about 5 seconds. The frequency of fixation of rearview mirror and blind spot, the fixation time of current lane and target lane and Targets such as gaze probability can be used to effectively characterize the driver’s lane map intent.