The car traveled around 15 miles on highways, surface streets, and even a roundabout. But many questions remain about the ...

Tesla boss Elon Musk said his firm has completed its first-ever driverless car delivery to a customer – a milestone that comes as struggling automaker scrambles to reverse a recent sales slump.

A Tesla drove itself from the dealership to a buyer's house -- which is pretty cool, except for a serious road safety flub.