A new study by researchers at the University of Bologna in Italy suggests that young drivers are twice as likely to have a crash if they felt sleepy at the wheel or have had problems sleeping. The study of students found that 56% who'd been involved in at least one accident said they had driven despite feeling sleepy, compared with 35% of those who had not been in a crash. According to the UK motoring organisation the RAC, driver sleepiness is estimated to account for around 20% of accidents on major roads
