Bicycles often fill in the gap between public transit and getting home. For those who cannot afford a car or who are forced farther and farther out from transportation hubs, bicycles play the role of “last-leg” transit option. Here, a bicycle is not a sign of luxury, but of necessity. 
http://www.thedailybeast.com/we-need-to-ditch-all-the-old-cliches-about-bicyclists