Wright on mobility
Wright sketched several pictures of Broadacre City, and with his students built a large model showing what a typical area might be like. Some views can be found on the web through Google's image search.
For Wright, it was mobility that would kill the centralized city:
Centralization, whether expressed as the city, the factory, the school or the farm, now has the enormous power of the machine-age setting dead against it. It is in the nature of universal or ubiquitous mobilization that the city spreads out far away and thin. It is in the nature of flying that the city disappears. It is in the nature of universal electrification that the city is nowhere or it is everywhere. . . .
By means of the motor car and the inventions that are here with it the horizon of the individual has immeasurably widened. A ride high into the air in any elevator today only shows the man how far he can go on the ground. And a view of the horizon gives him the desire to go. If he has the means, he goes, and his horizon widens as he goes. The physical release is at work upon his character. . . . After all he himself is the city. The city is going where he goes and as he goes. When he goes he will be gone where he may enjoy all that the centralized city ever really gave him, plus the security, freedom and beauty of the ground that is his. That means he is going to the country with his machine by means of the machine, in larger sense, that is opening the way for him. Wright 1932, 8-9
In this context we might consider Mitchell's comment that today the "continuous fields of presence provided by wireless networks can fundamentally alter patterns of resource availability and space use" (Mitchell 2003, 147).