弯道分心驾驶对行车安全风险的影响研究

Study on Influence of Distracted Driving on Curves on Road Safety Risk

为探究弯道上分心驾驶导致较大行车安全风险的内因,选择直线路段及半径分别为125、200、400和600 m的弯道路段2种场景共5种路况,通过模拟驾驶系统,研究了当驾驶员出现认知分心、视觉分心时,驾驶员的方向盘操作、心理舒适性以及车辆横向偏移的变化。结果表明:同一分心状态下,弯道路段分心驾驶对方向盘转动角速度ω、车辆横向偏移L以及驾驶员心率HR的影响均大于直线路段分心驾驶的,且弯道半径越小,影响越显著,行车安全风险越高;同一道路线形条件下,视觉分心驾驶对驾驶行为、车辆位置以及驾驶员舒适性的影响远大于认知分心驾驶的;半径为125 m弯道上视觉分心驾驶时,车辆横向偏移接近危险临界值,行车安全风险大大增加。

In order to explore the internal causes of driving safety risks caused by distracted driving on curves,five road conditions were selected,including straight road segment and curve road segment with radius of 125,200,400 and 600 m.By use of the driving simulation system,the changes of driver’s steering wheel operation,psychological comfort and vehicle lateral offset when the driver had cognitive distraction and visual distraction were studied.The results show that under the same distracted state,the effects of distracted driving on steering wheel rotation angular velocityω,vehicle lateral L and driver’s heart rate in curved road segment are greater than those in straight road segment.The smaller the curve radius,the more significant the impact,and the higher the driving safety risk.Under the same road alignment condition,the effects of visual distracted driving on driving behavior,vehicle position and driver comfort are far greater than those of cognitive distracted driving.When driving with visual distraction on a curve with a radius of 125 m,the lateral offset of the vehicle approaches the dangerous critical value,and the driving safety risk increases greatly.