Chicago Transportation Commissioner Gabe Klein announced today that Chicago will implement a large-scale bicycle-sharing program next year, the Sun-Times reports. The plan is to have 3,000 bikes available from 300 docking stations around the city by next summer, and then add another 2,000 bikes and 200 stations over the next two years. Members would get free use of the bikes for the first 30 minutes, then be charged a rental fee; the focus of the program is short trips around the city.