A pilot bicycle-sharing program in Silicon Valley will start in March, which feels like it's just around the corner for cycling advocate Joe Walton. “I've been working on getting folks to pedal bikes for a long time,” the Cupertino resident said. “I think we're on the right track.” He meant that literally. Commuters and even weekend shoppers would be able to check out bikes at Caltrain stations in San Jose, Palo Alto and Mountain View. They could use them for shopping, getting to work or simply riding around for fun, then return them at the end of the day.