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为定量分析双车道山区公路小半径反向连续弯道危险区域,以福州市森林公园至鼓岭道路的一个反向连续弯道为研究对象,采用路侧激光交通调查仪采集以小型车为主的交通流参数,并用摄像法和人工记录法获取小型车辆左前轮的行驶轨迹偏移量值;根据实测数据和断面位置的标定值,建立行驶轨迹偏移量、断面位置和行驶速度的三维关系模型;根据关系模型计算出不同速度下危险区域的长度和面积。结果表明:当车辆速度大于临界值时,危险区域的长度、面积与速度间存在二次多项式关系,随着车辆速度的增长,危险区域的范围不断扩大,危险等级不断上升。根据危险区域的变化情况,建议该路段的限速值为20~27 km/h。
In order to quantitatively analyze the dangerous zone of reverse radius of double-lane mountain road in reverse continuous curve, taking a reverse continuous curve from Fuzhou Forest Park to Kuling Road as the research object, a roadside laser traffic survey instrument The traffic flow parameters of the left front wheel of a small vehicle are obtained by the camera method and the manual recording method. Based on the measured data and the calibrated values of the cross-section position, the three-dimensional Relational model; according to the relationship model to calculate the length and area of dangerous areas at different speeds. The results show that there exists a quadratic polynomial relationship between the length and the area of the dangerous area and the speed of the vehicle when the vehicle speed is greater than the critical value. As the vehicle speed increases, the area of the dangerous area expands continuously and the danger level continues to rise. According to the change of the dangerous area, it is suggested that the speed limit of this section is 20 ~ 27 km / h.