驾驶员距离差感知度对交通流不稳定性的影响

Effects of the driver’s distance difference perception on traffic flow instability

针对实际交通中驾驶员距离差感知度对交通流不稳定性的重要影响,提出一种考虑驾驶员距离差感知度的跟驰模型,并对紧急交通情形下交通流不稳定性进行研究,得出如下结论:1)当实际车头间距小于感知安全距离时,距离差感知不敏感者的交通流不稳定区域更小;且对于感知不敏感者,驾驶员距离差感知度系数越小,交通流不稳定性越小,反之亦然;2)驾驶员距离差感知度系数越大,驾驶员需要的实际安全距离越小,反之亦然.

Based on the real traffic,the driver's distance difference perception has important effects on traffic flow instability,this paper proposes a new model considering the driver's distance difference perception for car-following to investigate traffic flow instability in the emergency traffic situation.The following conclusions are obtained:1)When the actual headway is smaller than the perceptual safe distance,traffic flow unstable area of the insensitive driver of the distance difference perception is smaller;furthermore,for the insensitive driver,the smaller the driver's distance difference perception coefficient,the smaller traffic flow instability and vice versa;2)The bigger the driver’s distance difference perception coefficient,the smaller the driver’s required actual safe distance and vice versa.