The line has seven stations including an interchange with the north-south Line M1 at Świętokrzyska in the city centre, which is also the deepest station on the network being constructed 23m below street level.
Line M2 was constructed by the AGP Poland consortium, which comprises Astaldi, Italy; Gulermak, Turkey; and PBDIM, Poland.
Services are operated by a fleet of 20 six-car Inspiro trains supplied by a consortium of Siemens and Newag and the journey time between Dworzec Wileński with Rondo Daszyńskiego is 12 minutes.
Tendering began last October for the second phase of the project, which will extend the line 3.4km west from Rondo Daszyńskiego to Ksiecia Janusza and 3.1km east from Dworzec Wileński to Targowek. The Zlotys 4bn project is due to be completed in 2019.