A study based on tests in actual driving conditions says that blue light keeps drivers awake just as effectively as coffee does especially at nights. The findings from the Universite Bordeaux Segalen France and Sweden could pave the way for the development of an electronic anti-sleep system to be built into vehicles and minimise fatal collisions. Sleepiness is responsible for a third of fatalities as it reduces a driver's alertness reflexes and visual perception. So in a bid to promote road safety experts are looking to develop an 'embedded' anti-sleepiness device working continuously the journal Public Library of Science One