Sofia Metro orders additional trains; to open Line 3 by end-2019, Bulgaria March 1, 2019 | Europe News Metropolitan JSC has exercised an option to procure an additional 10 three-car Inspiro metro trains from a consortium of Germany-based Siemens and Poland-based Newag for Sofia Metro Line 3. In Septemb... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password