The severity of driver fatigue in terms of line crossing: a pilot study comparing day- and night time driving in simulatorReportar como inadecuado

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European Transport Research Review

, 9:31

First Online: 30 May 2017Received: 28 December 2016Accepted: 22 May 2017DOI: 10.1007-s12544-017-0248-6

Cite this article as: Anund, A., Fors, C. & Ahlstrom, C. Eur. Transp. Res. Rev. 2017 9: 31. doi:10.1007-s12544-017-0248-6


IntroductionThe overall aim of this study is to compare day-time driving with night-time driving looking at line crossings during self-reported sleepiness and long blinks. The hypothesis is that high levels of self-reported sleepiness KSS 9 and long blink duration >0.15 s will be less associated with critical events during the day-time compared to night-time.

MethodThe study is based on data from a driving simulator experiment with 16 participants driving 150 km on a typical Swedish motorway scenario twice: once during daytime and once during night time. In total data from 6 segments of 4 km each equally distributed along the drive was averaged and included in the analysis. A Mixed Model Anova was used to test the effects on KSS, Blink Duration and Line Crossings with factors for Session Day-Night and Road segment 1–6, and participant as random. In addition, a logistic regression was used to identify when there is a risk for line crossings. Finally, the proportion of line crossings in relation to high KSS values and long blink durations was tested with Fisher’s exact test.

ResultsThe results show no differences in the percentage of Line Crossings to the left during high levels of Karolinska Sleepiness Scale during daytime 33% compare to night-time 40%. However, there was a significant difference between day and night time line crossings while the driver had long duration blinks 4% during daytime and 35% during night-time. Despite these results the most promising predictor of line crossings in each segment of 4 km-h was KSS with an Odds Ratio of 5.4 with a reference value at Karolinska Sleepiness Scale level 5.

ConclusionIn conclusion, the results do not support the hypothesis that high levels of KSS will result in more frequent line crossings at night time compared to day time. However, the result supports the hypothesis that long blink durations are associated with more line crossings when they appear during night time than during daytime.

KeywordsSimulator study Driver sleepiness Driver fatigue Subjective sleepiness Blink duration Lane deviations 

Autor: Anna Anund - Carina Fors - Christer Ahlstrom


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