What contextual and demographic factors predict drivers’ decision to engage in secondary tasks?

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What contextual and demographic factors predict drivers’ decision to engage in secondary tasks?

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Young, Kristie L. / Osborne, Rachel / Koppel, Sjaan / Charlton, Judith L. / Grzebieta, Raphael / Williamson, Ann / Haworth, Narelle / Woolley, Jeremy / Senserrick, Teresa

Abstract

This study used data from the Australian Naturalistic Driving Study to study driver engagement in secondary tasks during every day driving and examine the role that various driver characteristics and driving context variables play in influencing the initiation of secondary tasks. Video from 186 randomly selected trips were viewed to identify a range of secondary tasks and to classify contextual variables at the point of task initiation (e.g. vehicle motion, weather, and light conditions). Results revealed that secondary task engagement when driving is highly prevalent, with drivers spending ∼45% of their driving time engaging in potentially distracting tasks. The results also showed that drivers make a number of strategic decisions regarding when to engage, such as waiting until the vehicle is stationary; however, they do not appear to consider some contextual factors that may impact risks, such as weather and light conditions. The findings will be useful in targeting distraction countermeasures and policies and determining the effectiveness of these in reducing driver distraction.

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