[salman89]

I'll argue that signage and marking is already very well standardize and optimized for low ambiguity for human vision, but we are able to build things that humans cannot see but technology can.

The cars do have to be able to drive anywhere, but that doesn't mean we cannot improve quality of service in other areas. Suppose we can build roads where self driving cars can safely travel 100mph+ due to special infrastructure - I do see that as a big benefit.