It is really interesting to think about how arbitrarily difficult the problem of self driving cars becomes when they must be backwards compatible with existing

It is really interesting to think about how arbitrarily difficult the problem of self driving cars becomes when they must be backwards compatible with existing infrastructure and co-exist with it for quite a long period of time, decades probably. As Wozniak alludes to here, it might just be intractable (within a few-decades timeframe, probably not on a longer one) without concessions to adjusting the infrastructure to make the problem space smaller and solutions simpler and more practical. Banning or limiting human drivers on certain roads, repainting surfaces with thick white lines for tracing, automated checking for obstacles and cleaning, sensors along the side of highways, networking self driving vehicles, reducing speed limits -- all things that could vastly reduce the complexity but doing them or getting people to want to spend money on them might be very hard.