Document Detail

Age-related declines in car following performance under simulated fog conditions.
MedLine Citation:
PMID:  20380908     Owner:  NLM     Status:  MEDLINE    
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.
Rui Ni; Julie J Kang; George J Andersen
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Accident; analysis and prevention     Volume:  42     ISSN:  1879-2057     ISO Abbreviation:  Accid Anal Prev     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-04-12     Completed Date:  2011-01-06     Revised Date:  2014-09-15    
Medline Journal Info:
Nlm Unique ID:  1254476     Medline TA:  Accid Anal Prev     Country:  England    
Other Details:
Languages:  eng     Pagination:  818-26     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2009 Elsevier Ltd. All rights reserved.
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MeSH Terms
Age Factors
Analysis of Variance
Automobile Driving*
Health Services Accessibility
Task Performance and Analysis
Time Factors
Vision, Low*
Visual Acuity*
Young Adult
Grant Support
AG13419-06/AG/NIA NIH HHS; EY18334-01/EY/NEI NIH HHS; R01 AG031941/AG/NIA NIH HHS; R01 AG031941-01A1/AG/NIA NIH HHS; R01 EY018334/EY/NEI NIH HHS; R01 EY018334-03/EY/NEI NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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