Lexus' innovative head-monitoring safety system will be fitted as standard on its LS 460, LS 600h and LS 600h L models.
Using a dashboard-mounted camera and six LEDs, the Pre-Crash Safety (PCS) system measures the driver's face when they start up the car.
If the driver's head is then turned more than 15 degrees when the vehicle is moving and an obstacle is detected ahead, a buzzer automatically sounds and the brakes are briefly applied to warn of the danger
If the driver still fails to react the computer-controlled system performs emergency braking and pre-tensions the seatbelts ready for an impact.
A rear-mounted camera also monitors the back of the car and, if it detects an imminent impact, the front seat headrests move up and forwards to cushion the occupants head and protect against whiplash.
The PCS system was tested on more than 100 drivers and over 60,000 miles before being put into production. It will still operate if a driver wears sunglasses.
The system will come as standard on all future LS 460 models and on the LS 600h range, which goes on sale from November.
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