Driving Risks of Interchange Ramps Based on Vehicle Acceleration Data
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摘要: 为明确互通立交匝道的运行特性和驾驶风险,在重庆市南山立交和江南立交开展了超过30位被试者的小客车实车驾驶试验,通过Speedbox和Mobileye等车载高精度仪器采集了小客车在4条迂回式匝道上的连续运行数据,包括行驶速度、横向加速度、纵向加速度等,明确了迂回式匝道的车辆运行状态,然后运用表征横、纵向加速度关系的G-G图分析了匝道行驶过程中的驾驶风险,确定了立交匝道不同位置的危险等级及危险驾驶行为的高发路段。研究结果表明:①立交匝道上小客车的横向加速度与速度呈三角形分布,纵向加速度与速度呈椭圆形分布;②小半径曲线匝道上出现危险驾驶行为的比例要高于大半径曲线匝道;③通过统计不同断面的危险驾驶行为点占比,将匝道的危险断面分为低风险、中风险、高风险3个等级;④男性驾驶员在立交匝道上的危险驾驶行为占比要高于女性驾驶员,冒险型驾驶员的危险驾驶行为占比要高于其他驾驶风格的驾驶员;⑤立交匝道的危险高发路段通常位于速度变化剧烈的路段,即入弯减速段和出弯加速段。Abstract: More than 30 participants are tested in actual passenger-car driving test at Nanshan Interchange and Jiangnan Interchange in Chongqing to clarify the operating characteristics and driving risks of interchange ramps. Using high-precision equipment such as Speedbox and Mobileye, the continuous running data of passenger cars on four roundabout ramps are collected, including driving speed, lateral acceleration, and longitudinal acceleration. The running statuses of vehicles on roundabout ramps are specified. Besides, the G-G diagram, characterizing the relationship between lateral and longitudinal acceleration, is used to analyze the driving risk during ramp driving. The danger levels at different positions of the interchange ramps and the high-risk sections of dangerous driving behavior are determined. The results show that: ① The lateral acceleration and speed of the passenger cars on the interchange ramps are distributed in a triangle, and the longitudinal acceleration and speed are distributed in an elliptical shape. ② The proportion of dangerous driving behaviors on small radius curve ramps is higher than that on large radius curve ramps. ③ By counting the proportions of dangerous driving-behavior points of different sections, the dangerous sections of the ramps are divided into low risk, medium risk, and high risk. ④ Male drivers have a higher proportion of dangerous driving behaviors on the interchange ramps than female drivers, and adventurous drivers have a higher proportion of dangerous driving behaviors than that of drivers of other driving styles. ⑤ The dangerous high-incidence road sections of interchange ramps are usually located in the sections with drastic speed changes, namely the deceleration section of the turn and the acceleration section of the exit.
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Key words:
- traffic safety /
- interchange ramp /
- driving behaviors /
- G-G diagram /
- driving speed /
- lateral acceleration /
- longitudinal acceleration
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表 1 实验匝道技术指标
Table 1. Technical index of the experimental ramp
立交名称 匝道 设计速度/(km/h) 车道数 转向 转角/(°) 圆曲线半径/m 数据截取长度/m 南山立交 N1 40 单车道 左转 239 78 300 N2 右转 216 40 300 江南立交 J1 40 双车道 左转 196 100 600 J2 右转 166 50 380 表 2 实验驾驶员基本信息
Table 2. Basic information of experimental drivers
驾驶员/人 年龄/岁 驾龄/年 行驶里程/万km 男 女 均值 方差 均值 方差 均值 方差 17 16 38.4 31.9 10.7 24.5 25.88 866.1 表 3 不同性别驾驶员t检验结果
Table 3. T-Test results of drivers of different genders
驾驶员性别 速度均值/(km/h) 标准差 t P 男 43.21 5.174 14.387 0.000 728 女 41.19 5.202 表 4 不同驾驶风格驾驶员方差分析结果
Table 4. Variance analysis results of drivers with different driving styles
驾驶员风格 速度均值/(km/h) 方差 F P - value 愤怒型 41.40 27.023 3.479 193 0.099 266 冒险型 42.95 39.642 焦虑型 41.02 38.430 -
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