You're right, it stops some. But only a minority. > we would still need the other forms of transportation infrastructure to be able to handle the spillover tha

You're right, it stops some. But only a minority. > we would still need the other forms of transportation infrastructure to be able to handle the spillover that occurs when large amount of bikers don't feel like biking. Not necessarily. If you don't have (enough of) that infrastructure, less people will be tempted by it. I imagine the 20% in Copenhagen switch to public transportation because it is well developed and convenient. When I commuted by bicycle, weather wasn't a factor because I had no convenient alternative. Ditto for my colleagues who commuted by bicycle. I agree that the biggest problem is cultural.