Minsk is the only city in Belarus with an underground metro system. Construction of the metro began in 1977, soon after the city reached over a million people, and the first line with 8 stations was opened in 1984. Since then it has expanded into two lines: Maskoŭskaja and Aŭtazavodskaja, which are  long with 14 and 14 stations, respectively. On 7 November 2012, three new stations on the Moskovskaya Line were opened; work continues on a  extension, with one more station slated to open in 2014.