普通国省道典型线形条件下微观驾驶行为研究

Study on microscopic driving behavior under typical linear conditions of national and provincial highways

为改善山东省部分普通国省道事故多发的问题,提升区域路网的交通安全水平,选取长直线接小半径圆曲线、同向圆曲线、长下坡路段3类典型普通国省道线形开展自然驾驶试验,分析不同线形条件下的微观驾驶行为差异。结果表明:长下坡路段的速度差、区间平均速度均显著大于长直线接小半径圆曲线、同向圆曲线路段;长直线接小半径圆曲线的速度差与圆曲线半径呈正相关;同向圆曲线间直线段长度与速度差负相关。

In order to improve the accident-prone problem of some national and provincial highways in Shandong province and enhance the traffic safety level of the regional road network,the author selected three typical sections of long straight line with small radius curve,codirectional circular curve and long downhill section to carry out natural driving experiments,and analyzed the microscopic driving behavior parameter set under each linear condition.The final results show that the speed difference and the average speed of the long downhill section are significantly larger than those of the long straight line with small radius circular curve and the same direction circular curve section.The velocity difference of long straight line small radius circular curve is positively correlated with the radius of circular curve.The length of the straight line between the concentric circular curves is negatively correlated with the velocity difference.