long stretch of line between Vernouillet and Les Mureaux. Stations at Sartrouville and Les Mureaux were expanded and a through track installed for suburban services. 25 kV electrification by overhead wiring was made live on groupe V in 1966, on 11 January between Achères and Mantes for use for goods services only and on 20 September between Gare Saint-Lazare and Achères for suburban passenger services alike. To prepare for the arrival of overhead electrification, important structural work was done. Initiated in 1962, work ended in 1966. It included the raising of the bridge of the Place de l'Europe situated above the platforms at Gare Saint-Lazare and lowering the tracks below the bâtiment des docks, offices situated above high numbered platforms, lengthening of the platforms allocated to intercity services and the construction of the state of the art signal box, poste tout relais à transit souple (PRS). Electricity was switched on the line to Mantes via Conflans on 27 March 1967 and from Conflans to Pontoise on 14 May 1968. Rolling stock As a heritage of the Chemins de fer de l'Ouest and the Chemin de fer de l'État and due to its size, the Réseau Saint-Lazare inherited a number of particular and specifically designed rolling stock. Steam traction The following locomotives were in use for passenger duties on the Réseau Saint-Lazare: 030 T Ouest 040 TA Ouest 120 T Ouest 131 TA Ouest 141 TC Ouest 141 TD Ouest Electric traction The following rolling stock is in use for passenger duties on the Réseau Saint-Lazare: SNCF Class BB 16000 SNCF Class BB 16500 SNCF Class BB 17000 SNCF Class BB 26000 Including some electric multiple units: SNCF Class Z 1300 SNCF Class Z 1500 SNCF Class Z 6300 SNCF Class Z 6400 SNCF Class Z 20500 SNCF TGV Réseau Diesel traction Since the electrification of the main line to Caen and Cherbourg in June 1996, there no longer are regular services using diesel for Gare Saint-Lazare although some regional services in Normandy, part of the Réseau Saint-Lazare use DMUs and diesel locomotives. SNCF Class BB 67400 SNCF Class T 1000 SNCF Class T 2000 SNCF Class X 4630 SNCF Class X 72500 SNCF Class X 73500 Hauled stock Bidel passenger cars Voiture État à 2 étages 1933-1984 Rame inox de banlieue 1970–present Voiture de banlieue à 2 niveaux 1975–present Depots Trains operating in the Réseau Saint Lazare are maintained in