Turkey opens Ankara Metro Line M4 and Samsun Tram southeast extension September 2, 2016 | Europe News Test runs have begun on a 9.2-km northern section (underground) of Ankara Metro Line M4, and are expected to be completed by mid-December 2016. Line M4 will span 10.6 km from Gazino in the north to Kı... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password