Age-related declines in car following performance under simulated fog conditions.
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 18 m 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.
Ni
Rui
R
Department of Psychology, University of California-Riverside, Riverside, CA 92521, USA.
Kang
Julie J
JJ
Andersen
George J
GJ
D000054:Acceleration; D000367:Age Factors; D000368:Aged; D000375:Aging; D000704:Analysis of Variance; D001334:Automobile Driving; D001336:Automobiles; D005260:Female; D006297:Health Services Accessibility; D006801:Humans; D008297:Male; D010465:Perception; D013647:Task Performance and Analysis; D013997:Time Factors; D015354:Vision, Low; D014792:Visual Acuity; D014887:Weather; D055815:Young Adult
Hum Biol. 1950 Feb;22(1):1-33
15405673
Vision Res. 1983;23(7):689-99
6613011
Accid Anal Prev. 1999 May;31(3):181-98
10196595
Psychol Aging. 1991 Sep;6(3):403-15
1930757
J Opt Soc Am A. 1988 Dec;5(12):2210-9
3230491
Psychol Aging. 1999 Mar;14(1):135-54
10224638
J Exp Psychol Hum Percept Perform. 1999 Feb;25(1):256-69
10069034
Perception. 1998;27(9):1087-106
10341938
Psychol Aging. 1991 Mar;6(1):60-6
2029369
Psychol Aging. 2006 Mar;21(1):74-85
16594793
Accid Anal Prev. 1995 Feb;27(1):73-87
7718080
Psychol Aging. 1992 Dec;7(4):654-60
1466834
J Gerontol. 1982 Jan;37(1):59-63
7053399
Am J Optom Physiol Opt. 1977 Mar;54(3):178-84
301703
Hum Factors. 2007 Oct;49(5):878-96
17915604
Optom Vis Sci. 1994 Dec;71(12):736-42
7898880
J Exp Psychol Gen. 1999 Dec;128(4):416-49
10650582
Accid Anal Prev. 1992 Aug;24(4):317-27
1605814
Psychol Aging. 1992 Dec;7(4):518-25
1466820
Psychol Aging. 1990 Mar;5(1):138-43
2317293
J Gerontol. 1960 Jul;15:267-79
13817389
Neurology. 1991 Sep;41(9):1437-40
1891094
J Cataract Refract Surg. 2006 Nov;32(11):1897-8; author reply 1898
17081877
Acta Ophthalmol (Copenh). 1979 Aug;57(4):679-90
525292
Accid Anal Prev. 2007 Jan;39(1):106-16
16962059
Percept Psychophys. 2006 Jan;68(1):94-101
16617833
Am J Epidemiol. 1977 Jul;106(1):17-32
879158
Psychol Aging. 2004 Sep;19(3):506-14
15383000
Neuron. 2005 Feb 3;45(3):361-6
15694323
Psychol Aging. 1995 Dec;10(4):650-8
8749592
Psychol Aging. 1992 Sep;7(3):453-65
1388867
Science. 1980 Sep 12;209(4462):1255-6
7403884
Psychol Aging. 2008 Jun;23(2):342-352
18573008
Psychol Aging. 2005 Dec;20(4):610-22
16420136
J Gerontol. 1982 May;37(3):349-53
7069160
Vision Res. 2007 Mar;47(6):799-809
17289106
J Exp Psychol Hum Percept Perform. 1990 May;16(2):295-302
2142200