Now, a device to wake up drivers if they fall asleep

Cameras are set up to follow the line of vision even when the driver's head moves left or right, the Daily Mail reported.Utilising up to six dashboard-mounted cameras with compact 3 to 4 millimetre lenses, the system called 'Eye Tracker' processes up to 200 images per second to detect sleepiness using parameters like line of vision and eyelid position, irrespective of the position of the driver's head.

Professor Peter Husar of the institute said: "What we have developed is a small modular system with its own hardware and programmes on board, so that the line of vision is computed directly within the camera itself.

"Since the Eyetracker is fitted with at least two cameras that record images stereoscopically -- meaning in three dimensions -- the system can easily identify the spatial position of the pupil and the line of vision.

"It will immediately recognise when a driver‘s eyes are are tired or close their eyes for a moment."According to its developers, the alarm can either come in the form of flashing lights or a bell or siren, or even a vibrator on the steering wheel, and can be adapted to any car on the market, they said.

Testing of the system, which is about the size of a matchbook, is due to start in January 2011 and scientists hope it will be ready for sale by December.It is expected to cost around 100 pounds per unit.

Much interest has been shown in the system from heavy haulage companies whose drivers, particularly in third world countries, are prone to serious fatigue at the wheel, the developers said.