The Radiant City Le Corbusier’s advocacy of what he had come to call the “Radiant City” continued to his death, and in the 1960s he published his most complete vision, drawn with seductive elegance and insanely mesmerizing to the generation of architects teaching in my school days, for whom possession of a Corb drawing or painting was tantamount to owning a relic of the True Cross. Michael Sorkin, 20 Minutes in Manhattan utopia
The axis of movement Moving in the city means constantly changing the axis of movement. In general, lateral movement is confined to a single plane, what’s called grade, the ground level. Because circulation in multistory buildings is fundamentally one way—which is to say from the bottom up—the condition at the top is invariably different from that at the bottom. Rooftop circulation is the domain of Fantômas, of cat burglars and fleeing criminals, of lovers, and of those acrobatic enough to negotiate the gaps between buildings. Michael Sorkin, 20 Minutes in Manhattan A Burglar's Guide to the City movement