The Helsinki Metro is a metro system in Helsinki, Finland. It was opened on 2 August 1982 and remains the only metro system in Finland and the furthest north in the world. It is operated by Helsinki City Transport (HKL)[1] for Helsinki Regional Transport Authority (HSL)[2] and carries over 60 million passengers per year (62.8 million in 2017).[3]
The system contains 2 lines (M1 and M2)[4] with 30 stations along a total length of 43 kilometres (27 mi), running from southern Espoo via central Helsinki to the East Helsinki suburbs.[5] 21 of the stations are located in tunnels, including every station west of Sörnäinen as well as Puotila and Itäkeskus.[6] Every other station is on the surface or elevated. The Länsimetro extension continues the line into western Helsinki and the neighbouring municipality of Espoo.[6] The system has two depots, located in Roihupelto, Helsinki and Sammalvuori, Espoo.[6][7]