GM says almost-driverless cars coming by 2020
General Motors says that before the end of this decade it will begin selling cars that can almost drive themselves.
The automaker says a system, called "Super Cruise" will use radar and a camera to steer cars, keeping them between the lane lines. The radar also will keep cars a safe distance from cars head of them.
GM and other automakers already offer radar-guided cruise control systems that keep their cars safely behind other traffic. They also have systems that warn drivers if they're drifting out of their lanes. But until recently, GM says engineers haven't been able to steer with computers.
The GM system uses computers to control electric power steering, keeping the car in its lane. The company says such a car could be on the road in as little as six years.
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