左转车驾驶风格对直行车交互行为影响

Effect of Driving Style of Left-turning Vehicles on theInteraction Behavior of Straight-traveling Vehicles

驾驶风格是交通路口左转事故的主要成因,研究直行车面对不同驾驶风格的左转车速度变化能有效解释事故发生的原因,因此通过对北京市昌平区、海淀区、平谷区的三个交通路口进行实地观测,通过录像记录左转车转向角度,速度等指标以及直行车速度变化情况。观测时间选取7个工作日和4个节假日的高峰与非高峰时段。通过转向角度、速度等指标对左转车驾驶风格分类并比较其对直行车速度的影响。结果表明:左转车辆为激进型驾驶风格时,在工作日直行车大部分会保持原速行驶,因此容易导致事故的发生;在节假日大部分会选择减速行驶。面对保守型驾驶风格时,在工作日驾驶员大部分会选择保持原速行驶,在节假日依然如此。可见在时间的影响下,激进型的驾驶风格可能会诱发交互车辆的激进型行为;而保守型驾驶在任何时段下都会诱发交互车辆的激进型行为。研究所得结果可为预测混合交通的潜在后果提供参考,从而在未来使自动驾驶汽车更好融入混合交通道路中。

Driving style is the main cause of left-turn accidents at traffic intersections,and the study of the speed change of left-turning vehicles facing different driving styles of straight vehicles can effectively explain the causes of accidents.Therefore,field observations were made at three traffic intersections in Beijing's Changping,Haidian,and Pinggu districts,and the steering angles,speeds,and other indexes of the left-turning vehicles as well as the speed change of the straight vehicles were recorded by video.The observation time was selected as peak and off-peak hours on seven weekdays and four holidays.The driving styles of left-turning vehicles were categorized by steering angle and speed and compared with their effects on the speed of straight vehicles.The results show that when the left-turning vehicles are aggressive,most of the straight vehicles will keep the original speed on weekdays,which will easily lead to accidents;on holidays,most of them will choose to slow down.When facing conservative driving style,most drivers will choose to keep the original speed on weekdays,and still do so on holidays.It can be seen that under the influence of time,aggressive driving style may induce aggressive behaviors in interacting vehicles;while conservative driving induces aggressive behaviors in interacting vehicles under any time period.The results of the study may inform the prediction of potential consequences of mixed traffic,which may lead to better integration of self-driving cars into mixed traffic roads in the future.