are numbered 01 to 06. Second Generation The second generation of train on the line is made up of a group of 12 trains. Numbered 12 to 24. These trains, like the first generation, each train is made up of two sections resting on three bogies, with the outer two motored and the middle one non-motored. The trains are also bidirectional, however have six doors on each side, and the seats are arranged longitudinally. The trains were built by Ansaldo and introduced in 1992. Third Generation The most recent units on the line, those of the third generation, significantly differ to the previous two. They were delivered by Hitachi Rail Italy in 2016. There are 7 trains numbered 31 to 37. The trains are longer than previous generations at 39 meters and four articulated sections with five bogies. Of the five bogies, the central three are motored, which the outer two are not. There is a total four doors per each side of the bidirectional sets. Fourth generation In anticipation of the planned extensions and considering the now thirty-year service of the first generation trains, in 2020 the Municipality obtained a loan of 70 million Euros to purchase 14 new generation trains. In 2021 Hitachi Rail signed the contract to supply the new trains: it is expected that this supply will be delivered on a monthly basis (one train per month) between 2023 and 2024, coinciding with the inauguration of the Brin-Canepari and Brignole-Martinez routes. Future In March 2018, the Italian government announced the investment for an extension of one station at either end of the line, Canepari to the northwest and Martinez to the east. In addition, a further three train sets would be bought to accommodate the extension. A westward branch from Dinegro to Fiumara, with intermediate stations at Cantore and Genova Sampierdarena railway station, is planned to be complete by 2026 or 2027. This extension would be entirely underground with an estimated construction cost of €400 million. An elevated line running northward from Brignole, referred to as SkyTram, is also proposed. List of stations Canepari Brin Dinegro Principe (at Principe railway station) Darsena San Giorgio Sarzano/Sant'Agostino De Ferrari Brignole (at Brignole railway station) Network Map See also List of metro systems References Bibliography Paolo Gassani: Genova verso la metropolitana leggera. In: ″I Treni Oggi″ Nr. 27 (February 1983), p. 11–13. External links AMT Genoa - Metro official