The Metro has a very large expansion plan for the next half century. The Pravoberezhnaya Line was split in early 2009, and the new fifth line (Frunzensko-Primorskaya) took the northern (Primorsky) radius away from Pravoberezhnaya and opened with a new section (Frunzensky) to the south. The Pravoberezhnaya line will extend to the west, and then north to Lakhta, and then to Yuntolovo. The two stations, Bukharestskaya and Mezhdunarodnaya of the Frunzensko-Primorskaya line, opened in December 2012, will be followed by another three heading southward - Prospekt Slavy, Dunayskaya and Shushary. These should be open in 2018. Three new lines, Krasnoselsko-Kalininskaya, Admiralteysko-Okhtinskaya and Koltsevaya, will be opened. The first six stations of the Krasnoselsko-Kalininskaya line are already under construction, and should be open by 2020. The Admiralteysko-Okhtinskaya line should appear before 2025. The Koltsevaya line will be opened after 2025.