I don't see how smart roads would solve the issues of "the unexpected".. weird pedestrian behavior, getting cut off, parked trucks, construction, etc. It seems to me that smart roads would only solve the issue of general routing, and that already seems to be dealt with as far as I can tell.
It wouldn't. A real "smart road" implementation would require us to literally fence off those roads so pedestrians, deer, children, bicyclists, etc. cannot use them. And they would likely fail in any kind of inclement weather -- fog, snow, rain, etc.
Essentially an admission of failure for the self-driving car industry.
