Today it is not unusual to find urban planning interventions that judiciously make the best of the chance offered by the renovation of a square to turn it into the transitable roof of a car park, thus freeing its surrounding areas of the pressure of parked cars. Nonetheless, this operation of typological transformation in which a pavement or ground cover becomes a roof or framework, frequently entails subordination of the formal freedom of the square to the rigid order imposed by the sustaining construction. Furthermore, the different access points to the car park, whether they are ramps for cars or skylights on the stairs for pedestrians, tend to be rigid obstacles of coldly functional appearance that diminish the mobility and representativeness of the public space.