The suitable definition of and relationship between areas of centrality, the metropolitan road system and the green structure enable the structuring of the urban territory and green fabrics and areas within the metropolis and between the metropolis and the territories of the rest of the region.
Urban and social structure
The urban and social structure is presented as the sum of three layers:
First, the urban structure defines local and metropolitan areas of centrality, which are points or areas that generate and attract flows of people due to their cultural interest or their concentration of professional, leisure and consumer activities or services and facilities.
Second, these nodes are linked by a system of metropolitan roads that shape the urban territory, structuring its fabrics, defining the public space and enabling movement and social relations.
Finally, a green structure, formed by a system of green areas and connections (often superimposed over the metropolitan roads) between urban centres and between them and natural areas. This provides people with access to the ecosystem services provided by the elements in the biophysical matrix and also promotes conservation efforts.
First, the urban structure defines local and metropolitan areas of centrality, which are points or areas that generate and attract flows of people due to their cultural interest or their concentration of professional, leisure and consumer activities or services and facilities.
Second, these nodes are linked by a system of metropolitan roads that shape the urban territory, structuring its fabrics, defining the public space and enabling movement and social relations.
Finally, a green structure, formed by a system of green areas and connections (often superimposed over the metropolitan roads) between urban centres and between them and natural areas. This provides people with access to the ecosystem services provided by the elements in the biophysical matrix and also promotes conservation efforts.
ELEMENTS OF AREAS OF CENTRALITY
There is a distinction between local centres, organised based on a polynuclear structure that covers the whole territory, and metropolitan centres, which when added to the former create an even richer and more complex polycentric distribution. Taken together they improve public perception of the metropolis as a whole. The existing areas of centrality are related to each other and are directly linked to structural metropolitan facilities and to public transport stations, and the new metropolitan centres to be developed should follow this example.
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They make up the original structural level of the urban territory and are the traditional centres of cities and neighbourhoods. Together they form a constellation of hierarchically diverse points.
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![Centre històric de Viladecans]()
They make up the original structural level of the urban territory and are the traditional centres of cities and neighbourhoods. Together they form a constellation of hierarchically diverse points.
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![Rambla de Sant Boi de Llobregat]()
They make up the original structural level of the urban territory and are the traditional centres of cities and neighbourhoods. Together they form a constellation of hierarchically diverse points.
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The PDU determines which centres are to be maintained or strengthened within the network to be formed and also establishes new sites for metropolitan centres, for which the conditions for their development are defined: good accessibility to the public transport networks and high urban intensity.
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![METROPOLITAN CENTRES]()
The PDU determines which centres are to be maintained or strengthened within the network to be formed and also establishes new sites for metropolitan centres, for which the conditions for their development are defined: good accessibility to the public transport networks and high urban intensity.
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![Sector de la Marina de Viladecans]()
The PDU determines which centres are to be maintained or strengthened within the network to be formed and also establishes new sites for metropolitan centres, for which the conditions for their development are defined: good accessibility to the public transport networks and high urban intensity.
ELEMENTS OF METROPOLITAN ROADS
The purpose of this system of roads, along with elements of the green structure, is to bring people to the centres of the metropolis, to parks and open spaces, and to the major public transport nodes. Generally, the road system, which was developed based on private motorised mobility, has divorced territorial uses and activities from the streets, occupied the public space and created barriers to sustainable mobility. To reverse these trends and achieve a cohesive metropolitan city, the proposal is a system of metropolitan roads that supports sustainable mobility, guarantees the public space and structures the urban fabrics. These roads are: metropolitan avenues, metropolitan streets, metropolitan connectors and metropolitan paths. The order and priority of these roads is classified according to the intensity of people (not vehicles) they are to sustain.
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The avenues run through the entire metropolitan territory and should be adopted as the main structural connections of the metropolis. They must guarantee the flows and continuity for sustainable mobility, quality public spaces and a great intensity of uses. They are the main connections and should emphasise their historical value while lending cohesion to the metropolitan centres.
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![Metropolitan Avenues]()
The avenues run through the entire metropolitan territory and should be adopted as the main structural connections of the metropolis. They must guarantee the flows and continuity for sustainable mobility, quality public spaces and a great intensity of uses. They are the main connections and should emphasise their historical value while lending cohesion to the metropolitan centres.
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![Metropolitan Avenues]()
The avenues run through the entire metropolitan territory and should be adopted as the main structural connections of the metropolis. They must guarantee the flows and continuity for sustainable mobility, quality public spaces and a great intensity of uses. They are the main connections and should emphasise their historical value while lending cohesion to the metropolitan centres.
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Hierarchically below avenues, streets connect various nuclei and ensure continuity for pedestrians, cyclists and users of public transport, and they can maintain a reduced presence of private vehicle traffic.
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![Metropolitan Streets]()
Hierarchically below avenues, streets connect various nuclei and ensure continuity for pedestrians, cyclists and users of public transport, and they can maintain a reduced presence of private vehicle traffic.
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![Metropolitan Streets]()
Hierarchically below avenues, streets connect various nuclei and ensure continuity for pedestrians, cyclists and users of public transport, and they can maintain a reduced presence of private vehicle traffic.
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Their purpose is to distribute the traffic flows from high-capacity thoroughfares. They connect urban nuclei separated by open spaces, between the plains and the mountains, for example. They must play a key role in ensuring the continuity of networks for cyclists, pedestrians and users of public transport and in helping overcome fragmentation.
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![Metropolitan Connectors]()
Their purpose is to distribute the traffic flows from high-capacity thoroughfares. They connect urban nuclei separated by open spaces, between the plains and the mountains, for example. They must play a key role in ensuring the continuity of networks for cyclists, pedestrians and users of public transport and in helping overcome fragmentation.
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![Metropolitan Connectors]()
Their purpose is to distribute the traffic flows from high-capacity thoroughfares. They connect urban nuclei separated by open spaces, between the plains and the mountains, for example. They must play a key role in ensuring the continuity of networks for cyclists, pedestrians and users of public transport and in helping overcome fragmentation.
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Their main function is to facilitate people's access from the urban fabrics to agroforestry areas and zone their use. Their design should minimise impacts along their route.
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![Metropolitan Paths]()
Their main function is to facilitate people's access from the urban fabrics to agroforestry areas and zone their use. Their design should minimise impacts along their route.
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![Metropolitan Paths]()
Their main function is to facilitate people's access from the urban fabrics to agroforestry areas and zone their use. Their design should minimise impacts along their route.
ELEMENTS OF THE GREEN STRUCTURE
Formed by parks and structural green corridors, its mission is to provide the necessary links between urban settlements and their surroundings in order to produce more habitable urban spaces that introduce nature into the city, lend environmental quality to marginal or vulnerable areas and contribute continuity to urban green spaces. It will be one of the main vectors of metropolitan active mobility, reconnecting areas of centrality, facilities and public transport stations.
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They have a strategic function of metropolitan interest as the main providers of ecosystem services in the urban space.
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![Structural Parks]()
They have a strategic function of metropolitan interest as the main providers of ecosystem services in the urban space.
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![Structural Parks]()
They have a strategic function of metropolitan interest as the main providers of ecosystem services in the urban space.
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They establish green routes within the active mobility network with the aim of connecting urban settlements to each other and to their surroundings while also renaturing the city. The existing corridors must be reinforced and new ones must be created in order to form routes that link parks, facilities, public transport and gateways to the natural parks.
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![Parc Lúdic Fluvial del Llobregat]()
They establish green routes within the active mobility network with the aim of connecting urban settlements to each other and to their surroundings while also renaturing the city. The existing corridors must be reinforced and new ones must be created in order to form routes that link parks, facilities, public transport and gateways to the natural parks.
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![La llera del Besos, parc vertebral de 6 districtes]()
They establish green routes within the active mobility network with the aim of connecting urban settlements to each other and to their surroundings while also renaturing the city. The existing corridors must be reinforced and new ones must be created in order to form routes that link parks, facilities, public transport and gateways to the natural parks.
INDICATIVE MAP
Aims presented in the PDU Preliminary Document with respect to the urban and social structure.