The on-road experiences and awareness of sleepiness in a sample of Australian highway drivers: A roadside driver sleepiness study

Article

Watling, Christopher N., Armstrong, Kerry A., Smith, Simon S. and Wilson, Adrian. 2015. "The on-road experiences and awareness of sleepiness in a sample of Australian highway drivers: A roadside driver sleepiness study." Traffic Injury Prevention. 17 (1), pp. 24-30. https://doi.org/10.1080/15389588.2015.1033690
Article Title

The on-road experiences and awareness of sleepiness in a sample of Australian highway drivers: A roadside driver sleepiness study

ERA Journal ID30196
Article CategoryArticle
AuthorsWatling, Christopher N. (Author), Armstrong, Kerry A. (Author), Smith, Simon S. (Author) and Wilson, Adrian (Author)
Journal TitleTraffic Injury Prevention
Journal Citation17 (1), pp. 24-30
Number of Pages7
Year2015
Place of PublicationUnited States
ISSN1538-957X
1538-9588
Digital Object Identifier (DOI)https://doi.org/10.1080/15389588.2015.1033690
Web Address (URL)https://www.tandfonline.com/doi/full/10.1080/15389588.2015.1033690
Abstract

Objective: Driver sleepiness contributes substantially to road crash incidents. Simulator and on-road studies clearly reveal an impairing effect from sleepiness on driving ability. However, the degree to which drivers appreciate the dangerousness of driving while sleepy is somewhat unclear. This study sought to determine drivers' on-road experiences of sleepiness, their prior sleep habits, and personal awareness of the signs of sleepiness. Methods: Participants were a random selection of 92 drivers traveling on a major highway in the state of Queensland, Australia, who were stopped by police as part of routine drink driving operations. Participants completed a brief questionnaire that included demographic information, sleepy driving experiences (signs of sleepiness and on-road experiences of sleepiness), and prior sleep habits. A modified version of the Karolinska Sleepiness Scale (KSS) was used to assess subjective sleepiness in the 15 min prior to being stopped by police. Results: Participants' ratings of subjective sleepiness were quite low, with 90% reporting being alert to extremely alert on the KSS. Participants were reasonably aware of the signs of sleepiness, with many signs of sleepiness associated with on-road experiences of sleepiness. Additionally, the number of hours spent driving was positively correlated with the drivers' level of sleep debt. Conclusions: The results suggest that participants had moderate experiences of driving while sleepy and many were aware of the signs of sleepiness. The relationship between driving long distances and increased sleep debt is a concern for road safety. Increased education regarding the dangers of sleepy driving seems warranted.

KeywordsAustralian drivers; awareness of sleepiness; driver sleepiness; risky driving; roadside survey; sleep habits
ANZSRC Field of Research 2020520402. Decision making
420604. Injury prevention
520404. Memory and attention
Public Notes

File reproduced in accordance with the copyright policy of the publisher/author.

Byline AffiliationsQueensland University of Technology
Institution of OriginUniversity of Southern Queensland
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