Drivers need to be properly rested before setting off on long journeys says breakdown and road safety organisation GEM Motoring Assist. Being tired when you re driving raises the risk of a collision because you re less aware of what s happening around you according to GEM. Fatigued drivers are typically less aware of developing hazards ahead meaning they are likely to react late. That s why fatigue can be a factor in up to 20 per cent of all road collisions and up to 25 per cent of fatal and serious crashes1. GEM offers five simple tips for drivers to avoid reduce the risk of a fatigue-related collision: Get a good night s sleep before setting out on a long journey. Don t press on into the night on a long road journey. Avoid driving at times when you would usually be asleep. Avoid heavy meals on journeys especially at lunchtime as these can increase sleepiness in the afternoon. On long journeys take a break of at least 15 minutes after every two hours or 100 miles. Get out of the car do some exercise stretch or walk. If necessary have a caffeine drink or two to boost your alertness. You ll know when fatigue is affecting you. It doesn t just take you by surprise. So resist the urge to press on and take a proper break.