Today marks one year since Paris’ Vélib bike-sharing system was introduced. Vélib is the largest bike-sharing system in the world with 1,451 stations, 20,600 bicycles, and over 3 million subscribers generating $10 million in revenues for the city. In its first year, Vélib users took over 25 million bike trips, with an estimated 10% replacing car trips. Improved air quality, reduced congestion, and a generally better quality of life for the city’s residents are all benefits resulting from the bike-sharing system. However you look at it, Vélib has been a stunning success.