I have a Honda that seems to have solved all those problems. It doesn't really "take time" to measure velocity, at least in the context of moving objects with i

I have a Honda that seems to have solved all those problems. It doesn't really "take time" to measure velocity, at least in the context of moving objects with inertia and human reaction time. There is a way to deal with emergency braking that could be considered obvious and yet ingenious, if you have radar or something that can identify solid objects. Instinctively, you'd think these systems are complicated, and impossible to guaranteed correct behavior with. But you might set the threshold so that braking triggers slightly after avoiding an accident is physically impossible given the required acceleration vector. That basically guarantees that you can't make things worse.