This is interesting. A motorist that starts to fall asleep at the wheel could soon be woken by a vibrating steering wheel, vibrating seat or warning tone. The system – which is being developed by ARM Holdings in Cambridge and is some years from launch – incorporates a camera mounted in the rear-view mirror. It monitors the position of the motorist's head, eye alignment, facial expressions and blink rate for signs of fatigue. These include long, slow, blinks plus a lowered head. The system also scans for evidence that a driver is distracted by (say) an entertainment or satellite navigation system.

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