I don't want to be obvious about it, but there are a number of things, some trivial, some not, that have been addressed legislatively to be "Law of the Land". In most cases if you look around you will see little change in anyone's behavior. Most American's are not going to let something like a law prevent them from knocking down a cyclist who deserves it because they are "flaunting themselves in front of my car!"
These are the people who are scared spitless at the thought of AV technology depriving them of the right to use their cars as extensions of their will to right any number of social wrongs as they see it. I am kind of surprised to see as little love as exists for AV tech on this forum. But it is slowly dawning that way too much of the cyclist community is on two wheels due to unfortunate circumstances.