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La premisa fundamental de la que parte este estudio se fundamenta en el hecho de asumir los vínculos existentes entre organización territorial y ordenación del territorio, en el sentido de aceptar que el concepto convergente de desarrollo tiene en la actualidad un carácter integral, compendio de crecimiento económico, equidad socioterritorial y sustentabilidad ecológica, aplicado a distintas escalas espaciales. De esta manera se pueden implementar diferentes asociaciones intermunicipales, distintos proyectos de construcción de macrorregiones, e incluso propuestas transnacionales de cooperación interterritorial.

The rise of cycle tourism is based on the use of non-motorized itineraries, which favours a new tourist typology that makes possible the revitalization of rural and peripheral areas. At present, studies of sustainable mobility consider, to a large extent, intermodality, especially among public transportation means, which are not very polluting and collective, as in the case of railways. Andalusia has a huge variety of non-motorized itineraries (livestock trails, rural roads, greenways ...) associated with areas of great scenic and heritage value. The main objective of this research is the establishment of a methodology that allows to identify the existing links between railway lines in use and these itineraries. To do this, at the methodological level, a proximity study was carried out first using the Buffer Geoprocessing tool, and subsequently a Network Analysis to measure accessibility through this extension, in both cases of the ArcGIS program, applied to the Geographic Information System that has been implemented. Its main results are related to the determination of favourable routes for potential users of the "train+bike" intermodality in Andalusia. In addition, its conclusions are, therefore, indicative for further studies of detail.

The rail trails (converted disused railways) are infrastructures which can be reused mainly as non-motorised itineraries for hiking and cycle touring. Andalusia (Spain) has a network of 1442 km of disused railways, out of which 606 km are found in Huelva province (42.1%) as heritage from its former mining activity. The aim of this article is to devise a method which determines the real accessibility to rail trails and the volume of resident population who can reach them in a time period of 5, 10 and 15 minutes by road in a private vehicle. This process involves the determination of real accesses with accuracy and the differentiated calculation of the average speed on the different types of routes. The method is used for the three rail trails which currently exist in Huelva (98.6 km), having as a result a Map at a scale of 1:325,00

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