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Driving drowsy also worsens driver distraction
Clare Anderson1, James A Horne
1School of Psychology and Psychiatry, Monash University, VIC, Australia. clare.anderson@monash.edu
Sleep Medicine
|March 26, 2013
Summary
Drowsy drivers experience more distractions, increasing the risk of poor driving performance. Sleep restriction significantly elevates both driver distraction and lane-drifting incidents.
Area of Science:
- Sleep and Circadian Rhythms
- Human Factors in Transportation
- Cognitive Psychology
Background:
- Laboratory studies indicate drowsiness amplifies distraction.
- This effect remains under-investigated in real-world driving scenarios.
- Monotonous driving conditions may exacerbate drowsiness-related deficits.
Purpose of the Study:
- To investigate if drowsiness increases distraction in drivers under realistic conditions.
- To determine the impact of increased distraction on driving performance in drowsy drivers.
Main Methods:
- A repeated measures, counterbalanced design was employed.
- Participants drove in a car simulator for two hours after normal or restricted sleep (5 hours).
- Driver face videos were analyzed for distractions; lane-drifting incidents were recorded.
Main Results:
- Sleep restriction led to significantly more short (<3s) and long (>3s) distractions.
- A positive correlation between distractions and driving incidents was observed.
- Distraction-related incidents were significantly higher following sleep restriction.
Conclusions:
- Restricted sleep increases drivers' propensity for distraction.
- Increased distraction is linked to a higher likelihood of poor driving performance, including lane departures.
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