The real problem getting the US to accept biking is that we're not going to give up time. Time is money, or time is "quality of life". There are lots of people who cycle because they find that time spent valuable. There are far more who either want to work that extra hour, or want to spend the extra hour with family or in some other form of recreation. It's just not time well spent for many people. It's not about cost in dollars, it's about cost in time.