雾天不同能见度条件下高速公路限速建议值研究

A Study on Speed Limit of Different Visibility on Expressways under Foggy Weather

高速公路雾天不同能见度条件下,驾驶员对道路线形走向的敏感性有所变化,驾驶员需要不断调整方向盘,以不同的车速行驶在线形不断变化的高速公路上。为了探寻在雾天不同能见度条件下,驾驶员以不同车速通过不同曲率道路时的驾驶行为安全特性,利用UC-win/Road建立道路驾驶模拟环境,采集驾驶员在单因素和正交多因素实验方案条件下的车辆运行轨迹数据,结合驾驶行为特点提出了新的评价指标(车辆横向偏移系数)对驾驶员的驾驶行为进行分析。结果表明,能见度、圆曲线半径和车速对车辆横向偏移均具有显著性影响;并且通过正交试验确定各因素对车辆横向偏移影响由强到弱依次为:能见度(F=531.643)>圆曲线半径(F=256.599)>车速(F=45.986)。

Under foggy weather,visibility conditions are different on highways.Respond sensitivity of drivers changes with linear shapes of roads.Drivers have to constantly adjust steering wheel to keep driving on expressways with different linear shapes at different speeds.In order to study characteristics of safety driving behaviors under foggy weather when drivers pass different roads with different speeds under different visibility conditions,UC-win/Road is used to establish road driving simulations.Data collected from simulations of a single factor and orthogonal multi-factors is analyzed.According to the driving behaviors,a new evaluation index(vehicle lateral offset coefficient)is proposed.The result shows that visibility,radius of curve circle,and speed of the vehicle have significant effects on the lateral displacement of vehicles.An orthogonal test is used to determine the influences of each factor on lateral deviation of vehicles.From strong to weak there are:visibility(F=531.643)>radius of curve circle(F=256.599)>speed of the vehicle(F=45.986).