They are Seine-et-Marne (77), Yvelines (78), Essonne (91) and Val-d'Oise (95). The last three departments fashioned the Seine-et-Oise department until this was disbanded in 1968. The Alstom Citadis Dualis (the Tram-train model of the generic Citadis) was chosen to run the Montfermeil extension in January 2016. After World War II,...