I think that until computers have instinct and can anticipate the way the human mind can, we are safe from that bleak outcome, until they create a car with AI we should be good and if Skynet is anything to go by, I hope they never do..
One way around it would be if all the vehicles on the road were linked to the same operating system allowing all vehicles to know what every other vehicle on the road is doing, then having to factor in for the unpredictable ( wildlife, fallen trees, weather etc ) will be a problem. It will no doubt happen eventually but that will result in a complete halt in traffic infringements and until the government can work out how to replace such an easy way to raise massive amounts of revenue, not to mention the cost in implementing such a system or the cost to the user.. I can't see it happening anytime soon. I think for now, the odd 'self-drive' car here and there will just be a novelty.