premise of the space of flows

"The town is the correlate of the road. The town exists only as a function of circulation and circuits; it is a singular point on the circuits which create it and which it creates. It is defined by entries and exits; something must enter it and exit from it. It imposes a frequency. It effects a polarization of matter , inert, living or human; it causes the phylum, the flow, to pass through specific places, along horizontal lines. It is a phenomenon of transconsistency, a network, because it is fundamentally in contact with other towns"
Deleuze & Guattari, 1986