Obviously you roll out a safety critical system like this in the simplest scenarios first as you build confidence. Also, frankly, humans drive in situations wh

Obviously you roll out a safety critical system like this in the simplest scenarios first as you build confidence. Also, frankly, humans drive in situations where they just shouldn't. There are times where the conditions are so bad that the only correct decision is to just say it is not possible to safely drive today. Personally, I don't drive in dense fog because your options are basically drive too fast and risk hitting something you can't see, or drive at a sensible slow speed and risk being hit from behind - which isn't your fault but might still kill you. Even the most advanced aeroplanes with all the latest and greatest sensors still have defined limits where they won't fly. Also, that Arc de Triomphe example should just be replaced with a safe priority system. Priorité à droite is a silly rule, and it's especially silly on a roundabout. In my opinion, crashes there are the fault of the road, not the driver.