groupe IV on the 6 km section between Paris and Bois-Colombes. The press as well as the public saluted the arrival of the electric train which made some steam hauled trains look old. Indeed, some coaches in use were old 19th century double-deck passenger cars with notorious comfort. The rames standard was capable of carrying 372 seated passengers and were capable of being coupled together. They were stabled at Rueil-Malmaison, Bois-Colombes and Champ de Mars and servicing was performed at La Folie. The 7 km long railway line to Auteuil was electrified in January 1925. The line to Saint-Germain-en-Laye was electrified up to Rueil-Malmaison (14 km) in June 1926, then extended to Saint-Germain in 1927. The line to Versailles Rive Droite was electrified in July 1928 as well as between Puteaux and Issy-les-Moulineaux, Saint-Nom-la-Bretèche in May 1931 and the 10 km long line to Argenteuil in 1936 after the quadrupling of the tracks two years earlier. Electricity was fed to the EMUs under the third rail, as opposed to above the rail in Southern England. The third rail was fed by fourteen sub-stations themselves fed by 15000 V and 1500 V by power stations at Nanterre and Issy-les-Moulineaux. the sub-stations was partially automated in the early 1930s. When electrification was implemented, zoned services were put in place to decrease travel time, this meant that not all trains served all stations and semi-direct trains served the further stations. This decreased travel time for users of further town. From 1926, three trains served the Saint-Germain line: Saint Lazare-Bécon omnibus every fifteen minutes Saint Lazare-Bécon direct then omnibus to Rueil every half-hour Saint Lazare-Rueil direct then omnibus to Saint-Germain every half-hour (steam operated until 1927) To maximise electrification efficiency, Bloc automatique lumineux signalling (BAL) tested between Rueil-Malmaison and Le Pecq followed by a widespread implementation on all the close suburb between 1924 and 1931. Overhead electrification Allied bombing in 1944 destroyed much of the railway installations and disorganised services. Operated by the SNCF since 1938, Réseau Saint-Lazare, like Réseau Nord and Réseau Est was to be electrified with overhead wire. As it had been the case with other modernisation projects, track alteration took place when it was being prepared for electrification. A fourth track was installed between Achères and Poissy in 1961 as well as a saut-de-mouton and an intermediate terminus at Poissy. A fourth track was also installed on a 6 km