The Myth of Mobility: Why Faster Cities Often Leave People Behind

From article:

In many large urban areas, particularly those built during the late twentieth century, everyday necessities have been separated from residential life. Homes are clustered in residential zones while shops, restaurants, libraries, and workplaces are placed far away along commercial corridors or in large retail centers. The result is a city where nearly every basic activity requires driving.

On paper, this appears to increase mobility. In reality, it often reduces it.