> you need to always pay attention That is the fatal flaw in anything but a perfect system - any kind of system that is taking the decisions about steering fro

> you need to always pay attention That is the fatal flaw in anything but a perfect system - any kind of system that is taking the decisions about steering from the driver is going to result in the driver at best thinking about other things and worse getting into the back seat to change. If you had to develop a system to make sure someone was paying attention, you wouldn't make them sit in a warm comfy seat looking at a screen - you would make them actively engage with what they were looking at - like steering. And ultimately it doesn't matter how many hundreds of thousands of hours of driving you teach your system with, it may eventually be able to learn about parked cars, kerbs and road signs, but there won't be enough examples of different accidents and how emergency vehicles behave to ever make it behave safely. Humans can cope with driving emergencies fairly well (not perfectly admittedly) no matter how many they've been involved in using logic and higher level reasoning.