Areas built around trains and elevators, like midtown Manhattan and the Chicago Loop, have wider streets often organized in a grid. There are still shops on the streets, but most of the office space is much further from the ground. Cities built around the car, like much of Los Angeles and Phoenix and Houston, have enormous, gently curving roads and often lack sidewalks. In those places, shops and pedestrians retreat from the streets into malls. While older cities usually have an obvious center, dictated by an erstwhile port or a rail station, car cities do not. They
