This super-realistic virtual world is a driving school for AI

The problem is that for an AI to learn to handle the chaos of real roads, it has to be exposed to the full range of events that it might encounter. That's why driverless-car firms have spent the last decade driving millions of miles on streets around the world. A few, like Cruise and Waymo, have begun testing vehicles without human drivers in a handful of quiet urban environments in the US. But progress is still slow. "Why haven't we seen an expansion of these small pilots? Why aren't those vehicles everywhere?" asks Urtasun.