螺旋立交匝道行驶舒适性与危险驾驶行为

Driving comfort and dangerous driving behavior on helical ramp of interchange

为研究高悬空螺旋立交匝道的行驶舒适性与危险驾驶行为,在重庆市苏家坝立交开展自然驾驶试验,采集了小客车在螺旋匝道的行驶速度、纵/横向加速度变化数据,分析了纵/横向加速度峰值区间分布、特征分位值等特性,并对螺旋匝道的行驶舒适性进行了评价,同时引入G-G图方法对危险驾驶行为进行了辨识。结果表明:被试的制动减速度分布区间大于行车加速度;横向加速度基本保持恒定,上行匝道横向加速度的离散性大于下行匝道;螺旋匝道的纵向行驶舒适性较好,横向行驶舒适性较差,在横向上高达72.4%的被试感受到了不舒适;危险驾驶行为与横向加速度呈正相关关系。研究结果可为匝道线形设计、运行速度模型标定和交通运行管理提供依据。

In order to study the driving comfort and dangerous driving behavior of the high and overhead helical interchange ramp,the speed and longitudinal/lateral acceleration data of the passenger car were collected through the field operational test on Sujiaba interchange in Chongqing.The peak interval distribution,characteristic quantile value and other characteristics of the longitudinal/lateral acceleration were analyzed and used to evaluate the driving comfort of helical ramps.At the same time,the G-G diagram method was introduced to identify dangerous driving behaviors.The results show that the driver’s braking deceleration distribution interval is greater than the driving acceleration.The lateral acceleration remains basically constant,and the dispersion of the lateral acceleration of the upward ramp is greater than that of the downward ramp.The longitudinal driving comfort of the helical ramp is good,while the lateral driving comfort is poor,and up to 72.4%of the drivers feel uncomfortable in the lateral direction.Dangerous driving behavior is positively correlated with lateral acceleration.The research results can provide basis for ramp alignment design,operating speed model calibration and traffic operation management.