Earlier quoted context omitted.
I have been on Jeff's side of this bet since they announced it. Level 5 is simply too high of a bar to reach in the next few years, and in fact we are going about it the wrong way. We need smart roads more than smart cars. (Note that there's an escape hatch here, which is that the AI falls back to some human in a call center for guidance to get out of sticky situations. In my opinion that still doesn't qualify as lev…
Same, I don't see it happening unless most cars in the road have the capabality of intercommunication to perform sensor fusion with other cars. This implies that everyone gets on board using the same protocol. As for smart roads, what would these imply? Bear in mind maintenance costs and the fact that asphalt is 100% recycled and reusable.
The car would always have other sensors to fallback on, but this would reduce the amount of time that the DDT disengages due to inclement weather or other road hazards.
Add to this emitters in cones and possibly emergency vehicles.