The Hitachi Sirio (Italian for Sirius, formerly sold as the AnsaldoBreda Sirio) is a low-floor tram built by Hitachi Rail Italy (formerly AnsaldoBreda), a Japanese-Italian manufacturer of trains, trams and light-rail vehicles. It can be ordered as either one-directional or bi-directional and with a variety of track gauges. Operators Italy Milan Azienda Trasporti Milanesi (ATM), the city transport company of Milan, has bought 93 Sirios (all one direction cars). In 2002, the first carriages were delivered. The ATM has 58 seven section Sirios (7100 series) with a length of ; these trams have a capacity of 285 people, of which 71 can sit. The ATM has also 35 five section Sirietto (literally "little Sirio": 7500 series) with a length of ; these trams have a capacity of 191 people, of which 50 can sit. Both types of Sirios have a width of and have been built for the unusual track gauge of . The maximum speed is . Part of the 7500 will be numbered in the 7600 series because of minor modifications. It is not exactly known how many Sirio will be built. All Sirios in Milan sport a dark green livery; the Siriettos sport either the dark green livery or a white-and-yellow livery. Bergamo There are 14 bi-directional trams used on the Bergamo–Albino light rail. Florence There were delivered 46 (17+22+7) bi-directional trams. Naples There were delivered 22 bi-directional (driver seats in both ends) trams. Sassari 4 st bi-directional for Metrosassari. track gauge. Sweden Gothenburg The city of Gothenburg, Sweden, ordered 40 one-directional Sirio trams which were to be put into service on the Gothenburg tram network during 2005 and onwards. The trams were delivered late and functioned poorly when put into traffic. Among reported problems were excessive track damage caused by the trams, malfunctioning air conditioners inside the trams, and poor ride quality. The City of Gothenburg therefore withheld a large part of the payment for a delivered tram until fully operational. On December 3, 2009, the city authorities exercised their option for a further 25 trams of the same design at a cost of €61 million. In February 2013, 38 out of the total 40 trams delivered in the first series were taken out of service due to extensive corrosion on the chassis. Repairing the rusted chassis and moldy passenger floors is expected to be completed by 2017, at a cost of an extra €10 million