The Modifications to the General Metropolitan Plan transform a considerable part of the existing railway installations into green zones, and also envisage covering over much of the future rail tracks. The long thin park produced by this transformation is intended as the structural basis of the overall intervention, drawing together neighbourhoods which have, to date, been separated by the railway tracks. A series of avenues and small parks and squares (both existing and planned) will provide the basis for a mesh of public spaces which closely link the new park with the immediate public fabric of the city.

Initial ideas for this new park pick up the images suggested by the railway tracks as a starting point. Today, the train is not merely present in the area, it has actually become the driving force for future transformation. When work is completed, most of the train's itinerary will be covered over, though continuing to provide a substantial source of activity in the area. The lines of force of the new park originate in the lines drawn out by the passage of the train.

This is the basic idea chosen to give the park as a whole the unity it needs to become a recognisable part of the city and blend in with the characteristics of the various city sectors through which it passes. From a sector which is closely linked to the new station and the comings and goings of travellers and vehicles, to its contact with the Passeig de Santa Coloma, where the scale and urban fabric of the setting suggest a configuration with green as the predominant element where activity becomes less hectic, the park blends in and adapts to the requirements of place.

The first schemes concentrate on the topographic conditions produced by the construction of new stretches of railway track and the previsions of approved plans. The various surfaces planned, the appearance of the trees to be introduced and the characteristics emerging at different points all aim to respond to the requirements of connection and interchange between the park and the new uses planned around it, and between its two sides.