On a urban scale, private or shared bicycles can actively participate in a real-time representation of environmental conditions, give an accurate representation of aggregated mobility patterns and describe road conditions. The whole amount of data are sent to a Web served that collects and analyzes data instantaneously in order to support a wide range of services (health care, navigation, games, etc).

More info:
mobile.mit.edu/greenwheel
cities.media.mit.edu