RAILNET: Upgrading of rail-to-ground broadband telecommunications systems and a high-capacity integrated multi-service network. All this with the aim of promoting intelligent mobility, sustainable and innovative through the digital transformation of the operating and security systems of the Madrid Metro Network as well as the increase of train operating capacity and the provision of new commercial services (new customer support applications for passing on train information, such as temperature inside the passenger area or occupancy, based on the weight of each car, for better distribution of users on the platform and smoother boarding; Information on other means of transport with which