“Wernfer, damn him, keen-witted but unheimlich, is obsessed with railway lines, history emerges from geography of course, but for him the primary geography of the planet is the rails, obeying their own necessity, interconnections, places chosen and bypassed, centers and radiations therefrom, grades possible and impossible, how linked by canals, crossed by tunnels and bridges either in place or someday to be, capital made material – and flows of power as well, expressed for example in massive troop movements, now and in futurity – he styles himself the prophet of Eisenbahntüchtigkei, or railworthiness, each and every accomodation to the matrix of meaningful points, each taken as a coefficient in the planet’s unwritten equation…” (ATD p. 242)

For more on this see for instance Matterarts The Invention of Communication…