Full self driving is inevitably going to be a combination of road technologies paired with on-vehicle technologies.<p>Humans, the current most sophisticated driving intelligence, crash all the time.<p>AI, will need to be smarter than humans to outcompete in a world made for us, but if we bake some simple additional signals into the roads and other vehicles, the whole thing might work.<p>I am no longer optimistic about the next 5 years.