SNCF Class Z 50000 SNCF Class Z 50000 The SNCF Z 50000 is an electric multiple unit train built by Bombardier Transportation (manufacturer's designation SPACIUM 3.O6) for the French rail operator SNCF, for use under Transilien operations in the Île-de-France. It is commonly called ‘Francilien’, and sometimes ‘NAT’ (for , which was its project name). In 2004, the STIF (regional transit authority) began the tendering process for approximately 180 new EMUs to replace SNCF's aging stainless-steel single-deck suburban fleet. This stock nicknamed "inox " (short for "[acier] inoxydable": stainless steel) comprised EMUs Classes Z 5300, Z 6100, Z 6400 and similar push-pull trainsets known
SNCF stronger 25,000 hp (18,600 kW) engine, and broke the world speed record for conventional railway trains, reaching . The SNCF has a remarkable safety record. After nearly 30 years in operation, SNCF’s TGV system has only experienced one fatal accident, during trials rather than regular operations. In 2011 SNCF in partnership with Keolis, unsuccessfully bid for the InterCity West Coast franchise. In April 2017 SNCF took a 30% shareholding in a joint venture with Stagecoach Group and Virgin Group to bid for the West Coast Partnership that will operate services on the West Coast Main Line from May 2019 and