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The characteristics of sleepiness during real driving at night: a study of driving performance, physiology and subjective experience.
Chalmers Tekniska Högskola.
Swedish National Road and Transport Research Institute, Traffic and road users, Human-vehicle-transport system interaction.ORCID iD: 0000-0002-4790-7094
Swedish National Road and Transport Research Institute, Traffic and road users, Human-vehicle-transport system interaction.ORCID iD: 0000-0002-2061-5817
Stockholms Universitet.
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2011 (English)In: Sleep, ISSN 0161-8105, E-ISSN 1550-9109, Vol. 34, no 10, 1317-25 p.Article in journal (Refereed) Published
Abstract [en]

Most studies of sleepy driving have been carried out in driving simulators. A few studies of real driving are available, but these have used only a few sleepiness indicators. The purpose of the present study was to characterize sleepiness in several indicators during real driving at night, compared with daytime driving. Participants drove 55 km (at 90 km/h) on a 9-m-wide rural highway in southern Sweden. Daytime driving started at 09:00 or 11:00 (2 groups) and night driving at 01:00 or 03:00 (balanced design). 

Eighteen participants drawn from the local driving license register particpated in daytime and nighttime drives. The vehicle was an instrumented car with video monitoring of the edge of the road and recording of the lateral position and speed. Electroencephalography and electrooculography were recorded, together with ratings of sleepiness every 5 minutes. Pronounced effects of night driving were seen for subjective sleepiness, electroencephalographic indicators of sleepiness, blink duration, and speed. Also, time on task showed significant effects for subjective sleepiness, blink duration, lane position, and speed. Sleepiness was highest toward the end of the nighttime drive. Night driving caused a leftward shift in lateral position and a reduction of speed. The latter two findings, as well as the overall pattern of sleepiness indicators, provide new insights into the effects of night driving.

The conclusion is that night driving is associated with high levels of subjective, electrophysiologic, and behavioral sleepiness.

Place, publisher, year, edition, pages
2011. Vol. 34, no 10, 1317-25 p.
Keyword [en]
Fatigue (human), Night, Driving, Field, Performance (road user), Measurement, Characteristics, Medical aspects, Behaviour
National Category
Transport Systems and Logistics Other Medical Sciences not elsewhere specified
Research subject
80 Road: Traffic safety and accidents, 841 Road: Road user behaviour
Identifiers
URN: urn:nbn:se:vti:diva-7273DOI: 10.5665/SLEEP.1270ISI: 000295624800008PubMedID: 21966063ScopusID: s2.0-80053516876OAI: oai:DiVA.org:vti-7273DiVA: diva2:752702
Available from: 2014-10-06 Created: 2014-10-06 Last updated: 2016-08-31Bibliographically approved

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CiteExportLink to record
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