Life in cities—., in organized human settlements, which are mostly referred to as communities in this book—is possible only if people have mobility1 on a daily basis—the ability to move around so that they can do what they have to do or like to do. One char- acterization of a city is that it consists of specialized, frequently clustered, activities that perform discrete functions. Residences are separate from workplaces, major shopping is concentrated in identifiable centers, and larger entertainment and relaxation facil- ities are found at specific locations. They have to have accessi- bility. 2 Unlike in a village, very few of these destinations are reachable on foot; at least, they.
