I merely used California as an example of where biking could work . I’m aware that in much of the US it wouldn’t work. Biking will never be a viable form of transportation in low density/low population areas. But in regions where a huge percentage of the US lives, it absolutely would work. Your last paragraph is my point, we are in agreement. I think rather than just looking at the US as a whole, individual regions should be the focus for these kinds of things.