Scientists at Germany’s Fraunhofer Institute have designed a system to prevent drivers from nodding off at the wheel, developer Frank Klefenz told German Press Agency dpa on Tuesday.

The technology, which tracks eyelid and pupil movements, is to be installed in test vehicles early next year.

“The system would not affect or impair the driver in any way, but would immediately notice if they get tired or briefly close their eyes,” Klefenz said.

It can be connected to various warning devices such as a flashing light or a sound to alert the driver.

The system, called Eye Tracker, is being unveiled at the Vision fair in Stuttgart, Germany.

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