SWOV Catalogus

346376

Understanding drivers’ motivation to take a break when tired. Paper presented at the 2015 Australasian Road Safety Conference, Gold Coast, Australia, October 14-16, 2015.
20210568 ST [electronic version only]
Williamson, A. Friswell, R. Olivier, J. Grzebieta, R. & Zeller, R.
In: Proceedings of the 2015 Australasian Road Safety Conference, Gold Coast, Australia, October 14-16, 2015, [6] p., 13 ref.

Samenvatting Evidence shows that drivers are aware of and can report increasing fatigue while driving and most importantly can detect the likelihood of falling asleep prior to crashing. Drivers reporting high likelihood of falling asleep are around four times more likely to crash and nine times more likely to cross the centreline in a driving simulator. This shows that drivers can make an informed decision to drive or not drive when tired. The question is why drivers don't always make the safe choice when tired. The aim of the study was to investigate the impact of motivational factors on drivers' decision to respond or not to fatigue while driving. The study examined two motivational influences affecting fatigued drivers: the fear of fatigue-related crashes and the need to finish the trip in a specified time. The relative strength of influences was manipulated through monetary incentives. Three groups of 30 tired drivers did a two hour drive in a simulator in each of three conditions: Safety motivation - drivers were informed that an amount would be deducted from $100 whenever they had a serious safety incident; Time motivation - drivers were told that money would be deducted from their $100 if they were slower than expected; No motivation - drivers were paid $100 at the end of the trip regardless of safety or time. Preliminary results showed that Safety motivation was effective: many drivers took breaks and driving performance was improved compared to No motivation. Time motivation was also effective in making drivers take fewer breaks and complete the trip earlier. (Author/publisher)
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