The District Government announced on Friday during Bike to Work Day (and has been widely reported in the press) that DC will be teaming up with Arlington County to create an expanded bike share program between the two jurisdictions, which will become the largest bike share program in the U.S. It is likely that the expanded bike share program, which will contain 1,100 bikes at 114 stations, will include portions of Southwest (my guess is one will be located at the Waterfront-SEU Metro station). The current bike share program in DC only has ten stations - all located in Northwest. DC's burgeoning bike lane network includes 4th Street. Bike lanes were installed on the recently reopened portion of 4th Street and will connect to the bike lanes that run on Pennsylvania Avenue, NW later this year, as WashCycle reported last week.
Above is a bike share station used by the National Park Service, located in West Potomac Park at NPS Headquarters.