A car windscreen that acts as a giant head-up display to warn of hazards and boost safety is being developed by General Motors in the US.
Lasers, infrared sensors and cameras can make objects stand out that might otherwise go unnoticed.
For example, in fog, a laser projects a blue line onto the windscreen that follows the edge of the road.
Or if infrared sensors detect a person or animal in the driver's path at night, its outline is projected on the windshield to highlight its location.
Sensors determine the position of the car in relation to the road, and track the driver's head and eye movement to make sure the image on the windshield isn't skewed.
The screen is designed specifically for older drivers, who have vision problems at a much higher rate than other age groups and are the fastest growing group of drivers on the road in the US.
Said Cynthia Owsley, a professor of ophthalmology at the University of Alabama-Birmingham: "This has enormous implications for road safety."
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