SNCF Class BB 10003 locomotive was used as a test machine for operations of the TGV-TMST on 750 V and 3000 V. In 1998 the locomotive was converted back to a non-experimental class - as SNCF BB 15007. (SNCF Class BB 15000) The results were not as good as synchronous motor technology; it was not until the introduction of GTO transistor technology that series production of an asynchronous induction motored locomotive began in France, as the "Eurostar" TGV (1992), and later the BB 36000 "Astride" (1996). SNCF Class BB 10003 The locomotive SNCF BB 10003 was an experimental prototype locomotive converted from a SNCF
State Railway of Thailand State Railway of Thailand The State Railway of Thailand (SRT) (, ) is the state-owned rail operator under the jurisdiction of the Ministry of Transport in Thailand. , the network serves 47 provinces and around 35 million passengers annually. The passenger count is expected to double by 2027 when expansion plans are realised and the network grows to serve 61 provinces. The SRT was founded as the Royal State Railways of Siam (RSR) in 1890. King Chulalongkorn ordered the Department of Railways to be set up under the Department of Public Works and Town and Country Planning. Construction of the