This work has been prepared within the framework of the FET CHAIR, whose objective is to the promotion and dissemination of research in the field of transport. THE CHAIR FET is co-directed by Ms. Lourdes Trujillo Castellano and Mr. Javier Campos Méndez, both assigned to the Department of Applied Economic Analysis (DAEA) and the Research Team in Infrastructure Economics, the Transport and Tourism (EITT) of the University of Las Palmas de Gran Canaria (ULPGC). In addition to the above, they are also linked to the chair, such as professors and collaborating researchers, Ms. Ofelia Betancor Cruz, Ms. Pilar Socorro Quevedo, Mr. Juan Luis Eugenio Martin, Mr. Federico Inchausti Sintes and Mrs. Ivonne Pérez Pérez, all of them also attached to the DAEA and the EITT of the ULPGC. Claudia’s participation is also appreciated for this work. Benítez, Erika Blanco, Djilali Boutaleb, José Manuel Cazorla and Carmen García.