Driving millions of miles is easy if you are driving circles around a test track. Which is not quite what current self-driving cars are doing, but they aren't d

Driving millions of miles is easy if you are driving circles around a test track. Which is not quite what current self-driving cars are doing, but they aren't driving on arbitrary roads in all conditions either. I am exited about autonomous cars, but I'm not convinced they are as ready as various companies want us to believe.