This is the dramatic moment a sleeping driver swerves off the road and smashes into a metal barrier with his car driving at 100mph.
David Winkler, 43, was driving in the south of Hungary with his two sons when he accidentally fell asleep at the wheel.
The dramatic dashcam footage shows his vehicle heading terrifyingly towards the car in front before veering up the grass bank on the right and beginning to tilt.
At 100mph the Volvo rolls back down the verge and slams into the crash barrier, scraping along it for a short distance before coming to a stop, with the passengers fortunately escaping unharmed.
The dashcam shows the car gathering speed on the motorway, reaching 133kph (83mph) as it passes under a bridge and peaking at 163kph (101mph) at the moment of the crash.
Fortunately the Volvo XC90 took the brunt of the damage and Mr Winkler and his sons escaped unharmed.
The dozing driver said his legs were shaking for hours and he could not face watching the crash for several months, but nobody was hurt.
The crash happened at midday on the M6 motorway in Hungary, which runs south from Budapest parallel to the Danube.
David Winkler, 43, was driving in the south of Hungary with his two sons when he accidentally fell asleep at the wheel
The dashcam shows the car gathering speed on the motorway, shown here reaching 130kph (81mph) as it heads for a bridge
He said: ‘It was wonderful warm weather and me and my boys had just had something to eat.
‘I got that feeling of a long highway, travelling just over 80mph, my stomach was full, and I fell asleep as I accelerated.
‘I guess I fell asleep for 14 or 15 seconds and it happened. I woke up once the car came to a stop, but my son who was awake says it felt like it was going on forever.
‘My first reaction was to think of my kids. It was only after I realized nothing had happened to them that I thought about myself.’
The dramatic dashcam footage shows his vehicle heading terrifyingly towards the car in front before veering up the grass bank on the right and beginning to tilt
At 100mph the car rolls back down the verge and slams into the crash barrier, scraping along it for a short distance before coming to a stop