Piccadilly line

The **Piccadilly line** is a line of the London Underground. It is coloured dark blue on the Tube map. It is the fifth busiest line on the Underground network judged by the number of passengers transported per year. It is mainly a deep-level line, running from the north to the west of London via all different 6 zones on the London railway fare system. However, there are a number of surface sections mostly in its westernmost parts. Out of the 53 stations served, 25 are underground. It is the second longest line on the system, after the Central Line.

## Infrastructure 
### Rolling stock
Like all Underground lines, the Piccadilly line is operated by a single type of rolling stock. In this case it is the 1973 tube stock. The trains are painted in the standard London Underground livery of blue, white and red. Seventy-six trains out of a fleet of 88 are needed to run the line's peak service. One unit (166-566-366) was severely damaged by the terrorist attacks on 7 July 2005. The stock was recently refurbished, and was due for replacement by 2014, but the order for new trains was cancelled in July 2010. Aldwych was finally closed on 30 September 1994; the level of use was said to be too low to justify the £1&nbsp;million in estimated costs of a complete replacement of the lifts. The station is regularly used by film makers.
*  opened 15 December 1906; closed 30 July 1934, between  and .
*  opened 15 December 1906; closed 21 May 1932, between  and .
* Osterley & Spring Grove first served 13 March 1933; closed 24 March 1934 between  and . It was replaced by Osterley.
*  opened 23 June 1903; closed 5 July 1931. Although on the route of the current Piccadilly line, a short distance north of the present  station, it was never served by Piccadilly line trains. It was opened by the District line, the original operator of the line between  and , and was closed and replaced by the present Park Royal station before the Piccadilly line started running trains to South Harrow in 1932.
*  opened 15 December 1906; closed 19 September 1932, between  and . It has been suggested that this station may be reopened to serve new developments on the nearby Kings Cross railway lands, but this idea is not being progressed at present. The road the station served, 'York Road', has since been renamed 'York Way'.
## Future
The Piccadilly line was to be upgraded in 2014–15 and would have had new trains as well as new signalling. This would have increased the line's capacity by some 24%. Bids for the rolling-stock order were submitted in 2008. However, after the acquisition of Tube Lines by Transport for London in June 2010, this order was cancelled.

## Maps

* Cockfosters – 
* Oakwood – 
* Southgate – 
* Arnos Grove – 
* Bounds Green – 
* Wood Green – 
* Turnpike Lane – 
* Manor House – 
* Finsbury Park – 
* Arsenal – 
* Holloway Road – 
* Caledonian Road – 
* King's Cross St. Pancras – 
* Russell Square – 
* Holborn – 
* Covent Garden – 
* Leicester Square – 
* Piccadilly Circus – 
* Green Park – 
* Hyde Park Corner – 
* Knightsbridge – 
* South Kensington – 
* Gloucester Road – 
* Earl's Court – 
* Barons Court – 
* Hammersmith – 
* Turnham Green – 
* Acton Town – 

* South Ealing – 
* Northfields – 
* Boston Manor – 
* Osterley – 
* Hounslow East – 
* Hounslow Central – 
* Hounslow West – 
* Hatton Cross – 
* Heathrow Terminal 4 – 
* Heathrow Terminals 1, 2, 3 – 
* Heathrow Terminal 5 – 
* Ealing Common – 
* North Ealing – 
* Park Royal – 
* Alperton – 
* Sudbury Town – 
* Sudbury Hill – 
* South Harrow – 
* Rayners Lane – 
* Eastcote – 
* Ruislip Manor – 
* Ruislip – 
* Ickenham – 
* Hillingdon – 
* Uxbridge – 
* Cockfosters Depot – 
* Northfields Depot – 

## Related pages
* Leslie Green – architect of the Great Northern, Piccadilly & Brompton Railway's early stations
* Vauxhall Cross tube station – fictional Piccadilly line tube station

## References
;Notes

;Bibliography

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## Other websites
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