What are Australian drivers doing behind the wheel? An overview of secondary task data from the Australian Naturalistic Driving Study
Date
2019
Authors
Young, K.L.
Osborne, R.
Koppel, S.
Charlton, J.L.
Grzebieta, R.
Williamson, A.
Haworth, N.
Woolley, J.
Senserrick, T.
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Journal article
Citation
Journal of the Australasian College of Road Safety, 2019; 30(1):27-33
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Kristie L. Young, Rachel Osborne, Sjaan Koppel, Judith L. Charlton, Raphael Grzebieta, Ann Williamson, Narelle Haworth, Jeremy Woolley, and Teresa Senserrick
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Abstract
Using data from the Australian Naturalistic Driving Study (ANDS), this study examined patterns of secondary task engagement (e.g., mobile phone use, manipulating centre stack controls) during everyday driving trips to determine the type and duration of secondary task engaged in. Safety-related incidents associated with secondary task engagement were also examined. Results revealed that driver engagement in secondary tasks was frequent, with drivers engaging in one or more secondary tasks every 96 seconds, on average. However, drivers were more likely to initiate engagement in secondary tasks when the vehicle was stationary, suggesting that drivers do self-regulate the timing of task engagement to a certain degree. There was also evidence that drivers modified their engagement in a way suggestive of limiting their exposure to risk by engaging in some secondary tasks for shorter periods when the vehicle was moving compared to when it was stationary. Despite this, almost six percent of secondary tasks events were associated with a safety-related incident. The findings will be useful in targeting distraction countermeasures and policies and determining the effectiveness of these in managing driver distraction.
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