"Although millions of people in the United States love to ride bicycles for exercise or leisure, statistics show that only 1 per cent of the total U.S. population ride bicycles for transportation - and barely half as many use bikes to commute to work. In his original and exciting book, “One Less Car”, Zack Furness examines what it means historically, culturally, socioeconomically, and politically to be a bicycle transportation advocate/activist."
http://urbanvelo.org/one-less-car-bicycling-and-the-politics-of-automobility