The Jubilee Line is a line on the London Underground ("the Tube"), in England. It was built in two major sections - initially to Charing Cross in Central London, and later extended in 1999 to Stratford in East London. The Jubilee Line Extension stations are generally notable for their exceptional size and safety features (both being attempts to future-proof the line).
The Jubilee Line is coloured silver/grey on the Tube map.

History
When the Jubilee Line was opened, it was operated by 1972 stock. In 1984 this was partially replaced by the new 1983 Stock, the displaced 1972 Stock being transferred to the Bakerloo Line. The 1983 Stock proved to be unreliable and troublesome in service, with single-leaf doors making passenger loading and unloading a slower process than on other stock with wider door openings. With the construction of the Jubilee Line Extension, the opportunity was taken to introduce new trains, and today the line is worked by 1996 stock, which is similar to the 1995 Stock in use on the Northern Line. The new stock has internal displays and automated announcements to provide passengers with information on the train's route - at first they simply listed the destination of the train, and subsequently also listing the name of the next station and interchanges there. Subsequent modifications also made the text scroll across the internal display instead of just appear in it.

Rolling stock
The Jubilee Line closed for a five-day period starting on 26 December 2005 in order to add an extra carriage to each of the six-car trains. The line had to be closed while this work was done as six and seven car trains could not run in service at the same time because the platform edge doors at JLE stations could not cater for both train lengths simultaneously. Additionally, an extra four complete trains were added to the fleet, bringing the total to 63. The result is a 17% increase in capacity at peak times, allowing 6,000 more passengers per day to use Jubilee Line services. The signalling system was also upgraded. Work was completed and the line reopened two days ahead of schedule, on 29 December 2005.

The 2005 upgrade
The line is scheduled to switch to automatic train operation in 2009, using the SelTrac system currently on in use on the Docklands Light Railway. Equipment installation and testing for this began in late 2006.

Future



Stations
Inside a 1996 Stock train on the Jubilee Line.
1996 tube stock units stable at Stratford Market Depot.
A Jubilee Line train calls at Canary Wharf station.
The ticket hall of Canary Wharf station.