首页|基于实车数据的城市地下螺旋匝道小客车运行特性研究

基于实车数据的城市地下螺旋匝道小客车运行特性研究

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为明确城市地下螺旋匝道的驾驶行为模式和车辆运行特性,选取重庆市渝中区解放碑地下环道-洪崖门地下道开展实车驾驶试验.利用车载仪器采集了 20名驾驶人自然驾驶状态下的行驶速度、纵向加速度和横向加速度等运行参数,得到了螺旋匝道范围内车辆的速度特性、纵/横向加速度累积频率,探讨了纵向加速度、横向加速度与速度之间的关系,同时引入G-G图方法对危险驾驶行为进行辨识.研究结果表明:①螺旋匝道的实测速度远高于设计速度,驾驶人在连续下坡路段的弯道行车减速度高于加速度,连续弯道与独立弯道的横向加速度幅值在不同行驶方向下存在差异;②上行匝道弯道(R=80 m)的纵向加速度数据分布呈椭圆形,上行匝道弯道(R=40 m)和下行匝道弯道(R=80 m)的纵向减速度随速度的增加而下降,螺旋匝道其余弯道的纵向加(减)速度随速度的增加先上升后下降;③螺旋匝道弯道的横向加速度与速度呈正相关,仅上行匝道弯道(R=80 m)的横向加速度随速度的增加先上升后下降;④螺旋匝道弯道的风险路段主要位于出弯加速段,仅下行匝道弯道(R=40 m+30 m)在入弯减速段也存在风险路段.研究结果揭示了城市地下螺旋匝道小客车的运行特性,可以为未来城市地下道路螺旋匝道的限速方案和弯道几何设计提供参考.
Operating Characteristics of Urban Underground Helical Ramp Passenger Cars Based on Field Driving Data
To clarify the driving behavioral patterns and vehicle operational characteristics of urban underground helical ramps,a real vehicle driving test was conducted on the Jiefangbei Underground Ring Road-Hongyamen Underground Road in Yuzhong District,Chongqing City.Operating parameters,including driving speed and the longitudinal and lateral accelerations of 20 drivers under natural driving conditions,were collected by on-board instruments,and the speed characteristics and longitudinal/lateral acceleration cumulative frequency of vehicles in the helical ramp range were obtained.The relationships among the longitudinal and lateral accelerations and speed were analyzed,and a G-G diagram method was introduced to identify dangerous driving behaviors.The results reveal the following.① The measured speed of the helical ramp is much higher than the design speed,the deceleration of the driver in the continuous downhill section is higher than the acceleration,and the lateral acceleration amplitudes of continuous curves and independent curves differ in different driving directions.② The distribution of longitudinal acceleration data for the upward ramp curve(R=80 m)is elliptical,the longitudinal deceleration for the upward ramp curve(R=40 m)and the downward ramp curve(R=80 m)decreases with an increase in speed,and the longitudinal acceleration(deceleration)for the rest of the helical ramp curve first increases and then decreases with an increase in speed.③ The lateral acceleration of the helical ramp curve is positively correlated with the speed,whereas the lateral acceleration of the upward ramp curve(R=80 m)first increases and then decreases with an increase in speed.④ The risk section of the helical ramp curve is mainly located in the exit acceleration section,and only the downward ramp curve(R=40 m+30 m)also has a risk section in the entrance deceleration section.These results on the operational characteristics of passenger cars on urban underground helical ramps can be used to inform future speed limit schemes and curve geometry designs for urban underground helical ramps.

traffic engineeringoperational characteristicsreal vehicle testurban underground helical rampsoperational speedlongitudinal(lateral)accelerationdangerous driving behavior

郑展骥、郑礼伟、许宇轩、饶嘉强、张河山、徐进

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重庆交通大学智能综合立体交通重庆市重点实验室,重庆 400074

重庆交通大学交通运输学院,重庆 400074

新疆农业大学交通与物流工程学院,新疆乌鲁木齐 830091

交通工程 运行特性 实车试验 城市地下螺旋匝道 运行速度 纵(横)向加速度 危险驾驶行为

国家自然科学基金项目中国博士后科学基金项目重庆市自然科学基金项目

522024072022M710547CSTB2022NSCQ-BHX0731

2024

10.19721/j.cnki.1001-7372.2024.09.022

中国公路学报
中国公路学会

中国公路学报

CSTPCD北大核心
影响因子：1.607
ISSN：1001-7372
年,卷(期)：2024.37(9)