The activities carried out from 2006 to 2009 mainly involved updating the preliminary pilot project for the basic option, the bored rail tunnel, and the traffic-forecasting model, the economic and financial evaluation, the environmental impact study, a study on the socio-economic effects of the project on its adjoining regions (Tanger-Tétouan in the south and Andalusía in the north), and an overall evaluation of various aspects of the project, in addition to activities concerning the experimental work in Malabata and Tarifa and studies of the cartography, geodesy and currents in the Strait of Gibraltar.
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