New York City officials say the nation's largest bike-sharing system will begin sometime in May 2013, with 6,000 bikes at 330 stations in Manhattan and parts of Brooklyn, The Associated Press reported. The program will expand eventually to 10,000 bikes and 600 docking stations in Manhattan, Brooklyn and Queens.

Officials hope the privately funded bike-sharing program, dubbed Citi Bike, will add riders to the more than 700 miles of bike lanes and will be used by one-way commuters and round-trip tourists alike.