Automation of the London Underground Automation of the London Underground Automation of London Underground rolling stock has been partially implemented since the introduction of automatic train operation on the Hainault to Woodford section of the Central line in 1964. It is currently in use on four lines. Transport for London plans to extend this to other lines by 2022. Partially automated trains using Automatic Train Operation (ATO) have been used on passenger services on the Victoria line since 1968. The side doors to the driver's cab were sealed, so that access was normally through the passenger saloon. Since the trains were to be operated by
London Underground S Stock (ex-Metropolitan Railway) London Underground S Stock (ex-Metropolitan Railway) S stock is the designation given to one train of eight cars by London Underground in the 1930s. It was composed of converted trailers and experimental driving motor cars inherited from the Metropolitan Railway in 1933. In 1919, the Metropolitan Railway converted six 1904 saloon stock cars into the "Hustler train". These were the only cars of this type: two were driving motors, two were control trailers, which the Metropolitan called driving trailers, and the remaining two were trailers. In 1936, the two driving motors were converted into trailers, and all six cars were