Are robotaxis safe enough for our roads?

Robotaxis are already on the roads in some cities overseas, including San Francisco.  Elon Musk wants to call his version of the self-driving vehicle the Cyber Cab and he dreams of Tesla owners sending their cars out on their own to collect passengers.  But how close are we to having cars like this on Australian roads and are they really safe?  Featured:  Michael Milford, professor of robotics at Queensland University of Technology