Livability, a Transportation "Threefer"
Livable communities are places that achieve economic prosperity, environmental quality, and social equity -the "three Es" of sustainability. In terms of transportation, they are places where transportation modes other than driving are viable for activities such as walking or biking to school. The built environment of a livable community yields lower greenhouse gas emissions, reduced dependence on foreign oil, and improvements in public health (which are associated with lower health care costs).