The concept of the American megaregions was born in 2005 from the researchers of the University ‘Virginia Tech’ Robert Lang and Dawn Dhavale based on the model of the megalopolis introduced in the 60s. The researchers examined common patterns that make some metropolis regions almost homogeneous. The first defining element is population density. These concentrations of population are united by patterns that do not belong to administrative borders: topography, infrastructures, economic links …

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