Dynamic visual characteristics and load of drivers during overtaking maneuvers on prairie highways

doi:10.16265/j.cnki.issn1003-3033.2022.04.003

Abstract

Abstract:

In order to explore the visual perception and load characteristics of drivers in the process of overtaking on prairie highways, a driving test was carried out on typical prairie secondary roads. Drivers' eye movement data were collected, and change characteristics and load difference of typical eye movement indexes during free driving and overtaking vehicles of different types were analyzed and compared. The results show that the gaze duration, gaze rate, and saccade frequency of drivers during overtaking are significantly greater than free driving, and there is difference between vehicle types. The gaze point range is concentrated during overtaking, and gaze shift mode is fixed. For the case of overtaking a small vehicle, the probability of drivers' gaze point shifting between road ahead and the rear side mirror is greater than that of a large vehicle. The blinking time of drivers during overtaking is significantly lower than that of free driving. All these indicate that instantaneous increase in demand for driving tasks during overtaking leads to sudden changes in drivers' gaze characteristics and a significant increase in mental load.

Key words: prairie highways, overtaking maneuvers, visual characteristics, mental load, probability of gaze transition

LYU Zhen, QI Chunhua, ZHU Shoulin. Dynamic visual characteristics and load of drivers during overtaking maneuvers on prairie highways[J]. China Safety Science Journal, 2022, 32(4): 15-22.

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道路交通参数	参数值或特征
设计车速/(km·h^-1)	80
双向车道数(条)及车道宽度/m	2/4.5
直线段比例/%	80
路域景观	平原微丘,线形单一, 景观单调
交通流状态	自由流
大型车比例/%	20

对比工况		t值	p值 (显著性水平0.05)
自由行驶	超越小型车	12.323 89	2.378 09×10^-12	^***
自由行驶	超越大型车	16.982 92	8.449 91×10^-16	^***
超越小型车	超越大型车	4.659 03	2.112 73×10^-4	^***

对比工况		t值	p值 (显著性水平0.05)
自由行驶	超越小型车	9.979 58	2.770 18×10^-7	^***
自由行驶	超越大型车	6.189 52	4.339 8×10^-4	^***
超越小型车	超越大型车	3.790 06	0.031 71	^***

对比工况		t值	p值
自由行驶	超越小型车	9.896 64	3.313 18×10^-7	^***
自由行驶	超越大型车	5.765 04	9.686 91×10^-4	^***
超越小型车	超越大型车	4.131 61	0.018 13	^***