Passenger service commences on Paris T4 tram–train extension, France September 13, 2020 | Europe News The final 900-metre-long line of the Paris T4 tram–train extension project to Montfermeil Intercommunal Hospital has commenced passenger service. Passenger service had commenced on 4.1 km of the... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password