This is one of those important studies that needs to be crammed down the throat of Toronto’s iconoclast *cough* mayor.

Results Compared with car users the estimated annual change in mortality of the Barcelona residents using Bicing (n=181 982) was 0.03 deaths from road traffic incidents and 0.13 deaths from air pollution. As a result of physical activity, 12.46 deaths were avoided (benefit:risk ratio 77). The annual number of deaths avoided was 12.28. As a result of journeys by Bicing, annual carbon dioxide emissions were reduced by an estimated 9 062 344 kg.

Bike sharing lowers the costs to society of car culture. The physical activity encouraged by the service ended up saving 12 lives (in addition to dropping CO^2 emissions).

via – Building Better Bicycle Cultures: Bike Share Saves Lives.