A survey has found that the number of motorists driving when tired has gone up in recent years.
Road safety charity Brake and insurance company Direct Line found that around 74% of drivers in the past 12 months took to the wheels while feeling sleepy.
Six years ago, only 46% of motorists admitted to driving when tired.
Moreover, the survey also found that drivers are not adhering to the Government's advice of taking breaks after every two hours during long journeys, with 73% driving three or more hours at a stretch.
Just 69% of the 800 people questioned said they take regular rests on long journeys, compared with 70% who drive with a window open to keep alert.
More than half (54%) keep the radio on or listened to CDs to stay off sleep, while 21% take a nap during the rest break.
Peter Rodger, chief examiner at the Institute of Advanced Motorists said: "If you start to feel tired while driving, don't rely on air con or an open window: find a safe place to stop and only get back behind the wheel once you're properly refreshed.
"You should stop every two hours on any journey, whether you're tired or not, and should consider stopping overnight on long-haul journeys."
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