At the Detroit Auto Show, the Bolt was out of the blue.
A comparison chart shows just how big.
A pilot program will be available to an unspecified number of Model S electric-car owners, who will be invited to take part in the test.
A new study says that electric cars, charged by anything except coal, are preferable to gasoline vehicles.
Elon Musk tweeted a photo of Tesla's newest sedan, scheduled for unveiling October 9.