“…Then, the cost of the infrastructure and the years of development were assumed. Regarding costs, the average rail cost per kilometre (tunnel) was considered, which is about 44 million €, multiplied by the length of the Italian motorway network, equal to 6965.40 km, for a total of 306.477 billion € [ 18 ]. The line on which Arcade will travel will run under the Italian motorway network; therefore, assuming an advancement of 0.550 km per day, it has been estimated that the time needed to complete the infrastructure will be 35 years.…”