为了确定半地下枢纽互通匝道隧道出口与二次分流点间的安全距离,以优化线形设计并节约用地,研究了基于驾驶行为分解与运动学方程计算了理论安全距离,通过驾驶模拟实验收集了39名驾驶人在4种距离下的实验数据,采用Mann-Whitney U (MWU)检验选择了速度标准差、刹车踏板力度、车道偏移量3个指标,进而基于因子分析法构建了行车安全风险计算模型,并量化了不同距离下的风险分值。研究结果显示,理论安全距离为164.8 m,行车安全风险最低的距离为250 m。
Abstract
This study aims to determining the safe distance between the exit of the semi-underground hub interchange ramp tunnel and the secondary diversion point, so as to optimize line design and conserve land. In this study, the theoretical safe distances were calculated based on the decomposition of driving behavior and kinematic equations. Data were gathered from 39 drivers at four different distances through driving simulation tests. Speed standard deviation, brake pedal force, and lane offset served as selected indicators via the MW test. Factor analysis was employed to construct a driving safety risk calculation model and quantify the risk scores under different distance. The results show that the theoretical safety distance was 164.8 meters, and the distance with the lowest driving safety risk was 250 meters.
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