General Motors' top executive expects it will take decades for electric vehicles to take over as the dominant form of transportation but sees driverless cars on the road within five years.

CEO Mary Barra said American drivers will go electric, but it will take a long time for most of the 250 million vehicles on U.S. roads to be battery powered.

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Say What? GM Says EVs Will Take 20 Years To Be Adopted, But Self Driving Cars In Only 5

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