MANY motorists are putting lives at risk by driving for long periods while tired, says an RAC survey.
Some 46% of drivers admit to taking to the wheel while feeling drowsy and a third have been close to falling asleep while driving.
And 11% have driven more than 500 miles in a single journey without taking a break.
The biggest risk-takers are men aged 35-64, with 20% of all drivers completely unaware of the simple steps that can be taken to stay alert.
Nearly 70% of motorists wrongly think that winding the window down can ward off sleepiness.
And one in three believes turning up the stereo is the answer.