双车道公路下坡弯道路段货车偏移行为仿真研究

Simulation Research on Truck Offset Behavior on Downhill-Curved Road Section of Two-lane Highway

为了研究货车在下坡弯道路段的偏移行为,采用驾驶模拟仿真的方法,采集了货车在不同坡度、不同半径、不同转向条件下的行车轨迹数据,分析了横向偏移的形态及分布规律。结果表明相同半径、相同坡度、不同转向条件下,货车横向偏移的主方向、累计偏移方向均相反;最大偏移量随着曲线半径的减小而增大;半径和转向一定的条件下,坡度对偏移的均值和波动性影响不明显;最大偏移量服从正态分布。这些结论可作为安全设计的重要参考依据。

In order to study the offset behavior of trucks on the downhill curved road section,the driving simulation was used to collect the trajectory data of trucks under different slopes,radii and turning conditions,and the shape and distribution law of lateral offset were analyzed.The results show that under the same radius,the same slope and different turning conditions,the main direction and cumulative offset direction of the trucks’lateral offset are opposite.The maximum offset increases with the decrease of the radius.When the radius and the turning are fixed,the slope has no obvious influence on the mean and volatility of the offset.The maximum offsets obey normal distributions,which can be used as the main basis for safety design.