Wikipedia
Nanterre-Préfecture (Paris RER)
Nanterre-Préfecture is a RER train station in the commune of Nanterre, west of central Paris, in the department of Hauts-de-Seine in France. The station was opened on 1 October 1973, on the "ligne de St-Germain" connecting Auber and Saint-Germain. Currently, it is the westernmost station of the central section of RER A line. Line A splits here further to the west, into A1 (to Saint-Germain-en-Laye) and A3+A5 (to Cergy-le-Haut and Poissy).