Our urban design project in Madrid has focused thus far on large infrastructural moves, examining how parts of the city can be unplugged and reconnected. In part we are thinking of the site as a great automobile extractor for a downtown core that is over congested with traffic. As the scale of infrastructure increases in our world it becomes more viable to inject additional program enabling them to be routes as well as destinations.
Many of the cities pictured in science fiction have this densification of infrastructure, projecting the interactions of the city upwards- conceiving urban relationships in section more than plan. This massive vertical layering of the ground plane seems outrageous and unfeasible but it should be remembered that in most major cities today the accepted ground beneath our feet is both porous and artificial.