ABSTRACT
Differential mobility is in no way a new phenomenon; from the moment some people rode or were carried while others walked, there have existed differences in mobility which reflect and reinforce existing social structures. However, differential mobility is not always a matter of a simple correlation between greater wealth or status and greater speed; for example, in British cities, bicycle commuters tend to be better-educated with white-collar jobs. Mobility has always been configured by borders and boundaries composed of a multiplicity of hybrid objects, from infrastructure and technology to law and culture.
