89. With this dwelling unit as the starting point, relationships within the urban space will be established between habitation, work places, and the facilities set aside for leisure. What concerns us above all here are those activities which take place in town in the open air: i.e., actions which a person performs outside the familiar territory of his own home and for which he utilizes public space, as, for example, traveling to work, shopping, selling goods, recreations, leisure activities, sporting events, deliveries, etc. Although the asphalt carpet that serves as a channel for the movement of cars is still called a “street,” it retains no connection with the original significance of the term. Ground-the territory of the country-must be made available at any time and at its fair market value, to be assessed before projects are worked out. The machinist era has introduced new techniques, which are one of the causes of the disorder and the upheaval of the cities.