My suggestion for pedestrians is to treat cars like guns. Just as you assume a gun is loaded, you should assume a car does not see you. I see people stepping into crosswalks staring at their phones after barely glancing up to see the light has changed. They have no idea if the oncoming traffic is slowing/stopping for them. It's a problem now, and I think self-driving cars have the potential to make it worse (as, at the same time, they are making it better in other ways).