Are the Self-Driving Cars Learning the Rules of the Road?

Self-driving cars could learn the, maybe slightly more chaotic driving of people and then try to work around that. This has already become an issue with Tesla in the US whose limited self-driving technology had a mode that meant you didn't have to stop at a stop sign. And unless we think about them and debate them, then we risk slipping into a new set of rules of the road - which may not be good for us all.