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非对称边缘率标线对弯道驾驶人横向位置调整的影响机理

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Keywords: 交通工程,弯道,路上试验,横向位置,时间频率差值,车速,结构方程模型

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Abstract:

?为了揭示非对称边缘率标线对弯道驾驶人横向位置调整的影响机理,在高速公路弯道上开展路上试验,分别布设2种不同的非对称边缘率标线,采集了断面车速、车头时距及左右车轮在车道的横向位置等数据,运用结构方程模型研究了影响路径.结果表明:驾驶人偏离感知速度大的一侧,标准路径系数为-0.46;驾驶人通过降低车速来减小内外侧感知速度差异,内外侧感知速度差异越大,减速幅度越大,越偏向曲线内侧,标准路径系数为0.08;两侧感知速度差异增大能提高驾驶人弯道车速危险性感知,使驾驶人降低车速进而影响车辆横向位置,标准路径系数为0.03;边缘率标线通过增大驾驶人感知速度间接影响车辆横向位置,标准路径系数为0.14;距离内外侧标线距离的标准路径系数分别为0.26和-0.28.各路径影响效果合成后,驾驶人整体上偏离速度感知大的一侧.

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