The Atlantic Cities reports this morning that a recent customer survey from Capital Bikeshare, the metro area's rapidly expanding bike-share service that already boasts 18,000 members, found that 56 percent of more than 5,000 respondents reported taking fewer taxi rides since joining the service. As the newest entry in the city's public transportation landscape, CaBi has turned out to be uniquely well positioned to take the place of a quick taxi ride. It's become quite normal, just for example, to see business suit-wearing men and women downtown zipping to their next meeting on those bright red bikes. With its annual membership fee of $75 which includes all trips up to 30 minutes, replacing even one weekly $10 cab ride across town with a Bikeshare ride pays for itself in under two months.