I dunno....I tend to side with Lex in that we take much for granted when it comes to human capabilities and driving is one example. Think about the number and variety of scenarios that's possible to encounter while driving. Is it plausible to believe that we'll have A.I. and sensing systems capable of handling 100% of these? I think we'll get to maybe 99.5%, but that means a certain number of fatalities will be the result of non-manageable (by A.I.) situations. That number may be far less than the estimated 20,000+ automobile fatalities annually in the US, but is the reduced death enough to influence Congress to make the appropriate legislation and to satisfy a very, very risk-averse general public?  Another thing I wonder about is the 10-20 times in my life as a driver that I have encountered situations on the road where I was temporarily blinded, such as a sudden downpour, intense hailstorm, some blankets blown out of the vehicle ahead of me on the freeway, etc. How does a self-driving car deal with sudden loss of "sensory input" in a safe manner (slamming on the brakes could cause a multiple car pile-up).... so many questions.....,(reply>), engineering consists of answering questions.<br>if governments are unaccepting of vastly improved but not truly perfect driving then that's their problem of course.