Cars and cities have a complicated relationship. Today, plagued with swelling road congestion and rising air pollution, we tend to think of the two as increasingly incompatible. But during the 20th century the automobile left one of the most durable marks on city planning. As Swiss-born architect Le Corbusier declared in his seminal 1925 book The City of To-morrow and Its Planning, “The motor-car ... has completely overturned all our old ideas of town planning.”