Active Transportation for America:
Active transportation is bicycling and walking as an everyday transportation choice. "Active Transportation for America" makes the case and quantifies the national benefits for the first time that increased federal funding in bicycling and walking infrastructure would provide tens of billions of dollars in benefits to all Americans. By making active transportation a viable option for everyday travel, we will cost-effectively reduce oil dependence, climate pollution and obesity rates while providing more and better choices for getting around town. Some may view active transportation as marginal, but bicycling and walking account for 10 percent of trips in the nation. Half of the trips in America are within a 20-minute bike ride and a quarter of trips are within a 20-minute walk, yet most are taken by automobile.
P.S.: Very interesting chart:
Increase in Miles Driven and Obesity