There is a small metro system in Almaty. A second and third metro lines are planned in the future. The second line would intersect with the first line at Alatau and Zhibek Zholy stations. In May 2011, the construction of the second phase of the Almaty Metro line 1 began. The general contractor is Almatymetrokurylys. Currently more than of tunnels on the extension project have been excavated. The extension includes five new stations, and will connect the downtown area of Almaty with Kalkaman in the suburbs. Its length will be . The construction is divided into 3 phases. The first phase (the current phase) will be the addition of two stations: Sairan and Moscow, a length of . For more details see: Almaty Metro.There was a tram system of 10 lines which operated from 1937 to 2015.