Age-related declines in car following performance under simulated fog conditions.
Age-related declines in car following performance under simulated fog conditions.
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DOI：
10.1016/j.aap.2009.04.023
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发表时间：
2010-05
影响因子：
5.9
通讯作者：
Andersen, George J.
中科院分区：
文献类型：
--
作者：
Ni, Rui;Kang, Julie J.;Andersen, George J.
本研究探讨了年龄相关的差异，在汽车跟随性能时，对比度的驾驶场景减少模拟雾。老年人（平均年龄为72.6岁）和年轻人（平均年龄为21.1岁）的司机提出了一个汽车以下的情况下，在一个模拟器中，一个领先的车辆（LV）根据三个正弦波函数的总和改变速度。驾驶员的初始跟车距离为18米，并被要求通过控制速度以匹配LV速度的变化来保持车头时距。五个模拟雾条件进行了检查，范围从无雾条件（对比度为0.55）到高雾条件（对比度为0.03）。平均LV速度在试验中变化（40、60或80 km/h）。结果表明，与年龄相关的下降，在汽车跟随性能的车头时距和RMS（均方根）匹配速度的误差。最大的下降发生在最高雾密度条件下的中速，老年驾驶员保持的车头时距比年轻驾驶员近21%。在较高的速度下，年长的驾驶员比年轻的驾驶员保持更大的车头时距。这些结果表明，在高雾密度和中等速度下，年龄较大的驾驶员可能面临更大的碰撞风险。
The present study examined age-related differences in car following performance when contrast of the driving scene was reduced by simulated fog. Older (mean age of 72.6) and younger (mean age of 21.1) drivers were presented with a car following scenario in a simulator in which a lead vehicle (LV) varied speed according to a sum of three sine wave functions. Drivers were shown an initial following distance of 18m and were asked to maintain headway distance by controlling speed to match changes in LV speed. Five simulated fog conditions were examined ranging from a no fog condition (contrast of 0.55) to a high fog condition (contrast of 0.03). Average LV speed varied across trials (40, 60, or 80 km/h). The results indicated age-related declines in car following performance for both headway distance and RMS (root mean square) error in matching speed. The greatest decline occurred at moderate speeds under the highest fog density condition, with older drivers maintaining a headway distance that was 21% closer than younger drivers. At higher speeds older drivers maintained a greater headway distance than younger drivers. These results suggest that older drivers may be at greater risk for a collision under high fog density and moderate speeds.
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