A study of motorists in France has found those who admit to driving while tired are considerably more at risk of serious crashes.

Drivers reporting driving while tired ‘a few times in the year’ were one-and-a-half times more likely to have been involved in a serious road traffic accident (RTA) compared with those who reported not driving while sleepy. Those who admitted doing so ‘once a month or more often’ were nearly three times more likely to have been involved in a serious RTA. French researchers from the Institut National de la Santé et de la Recherche Médicale and the Institut National de Recherche sur les Transports et leur Sécurité examined the association between 13,299 middle-aged drivers admitting driving in France while sleepy and their risk of serious road traffic accidents.

The report, published in the British Medical Journal, said: ‘Self-assessed driving while sleepy is a powerful predictor of serious road traffic accidents and suggests that drivers are aware that they are sleepy when driving but do not act accordingly.’