I imagine that one could devise a pretty clever self-driving car that, under normal circumstances, is better than many drivers I see on the road. What I can’t imagine is that mixing these cars with the erratic drivers that are *currently* on the road would be good at all.
The problem isn’t that the driver can’t override the system — they can — the issue I have is that most people interested in this wouldn’t be paying attention at all.
The biggest challenge for these cars is whether they can “foresee” impending crashes. Meaning when I drive down a residential street on a nice day I keep an eye out for kids playing that may suddenly go running after a loose ball, how could a car do that? No matter how advanced sometimes you just can’t beat the human eye. Because the first time a ‘driverless’ car kills a kid in an accident that a human could have avoided — well that’s the end of the dream.