I expect as far as the social aspect of driverless cars making their way through our neighbourhoods goes, eventually most humans will just come to see them as a

I expect as far as the social aspect of driverless cars making their way through our neighbourhoods goes, eventually most humans will just come to see them as an odd type of animal. Like a horse. It probably wouldn't hurt to give them some active animal-like cosmetic features that help nearby humans anticipate what they are "thinking". Delightful symmetry there, no? The first great task of mechanized transport was getting rid of the horse aspects, the second was building them back in.