south of Leyton. In 1947, the line opened to Leytonstone, and then Woodford and Newbury Park. Stations from Newbury Park to Woodford via Hainault and from Woodford to Loughton were served by tube trains from 1948. South of Newbury Park, the west-facing junction with the main line closed in the same year to allow expansion of Ilford carriage depot. The extension transferred to London Underground management in 1949, when Epping began to be served by Central line trains. The single line to Ongar was served by a steam autotrain operated by British Rail (BR) until 1957, when the line was electrified. BR trains accessed the line via a link from Temple Mills East to Leyton. The Central line stations east of Stratford kept their goods service for a time, being worked from Temple Mills, with the Hainault loop stations served via Woodford. The BR line south of Newbury Park closed in 1956 and Hainault loop stations lost their goods service in 1965, the rest of the stations on the line following in 1966. Early morning passenger trains from Stratford (Liverpool Street on Sundays) ran to Epping or Loughton until 1970. The single-track section from Epping to Ongar was electrified in 1957 and then operated as a shuttle service using short tube trains. However, carrying only 100 passengers a day and losing money, the section closed in 1994, and is now used by the heritage Epping Ongar Railway. The entire Central line was shut between January and March 2003, after 32 passengers were injured when a train derailed at Chancery Lane due to a traction motor falling on to the track. The line was not fully reopened until June. In 2003, the infrastructure of the Central line was partly privatised in a public–private partnership, managed by the Metronet consortium. Metronet went into administration in 2007, and Transport for London (TfL) took over its responsibilities. Route Map Railway line The Central line is long and serves 49 stations. The line is predominantly double-track, widened to three tracks for short sections south of Leytonstone and west of White City; no track is shared with any other line, though some sections do run parallel to other routes. Total track length is , of which is in tunnel; this track is electrified with a four-rail DC system: a central conductor rail is energised at −210 V and a rail outside the running rail at +420