Drivers can assess when they are sleepy, but they don't act
Self assessed driving while sleepy is a powerful predictor of serious road traffic accidents, suggesting that drivers' awareness of their sleepiness while driving is not enough to prevent them from having road traffic accidents. Nabi and colleagues (p 75) asked 13 000 members of the GAZEL cohort about sleepiness and driving behaviours and followed them for three years. The number of serious road traffic accidents increased proportionally with the frequency of self reported driving while sleepy. Messages on prevention should therefore focus on convincing sleepy drivers to stop driving, say the authors., http://www.100md.com