| | Line facts - Transport for London (Site not responding. Last check: 2007-10-21) |
 | | The Piccadilly line is principally the legacy of one of the great pioneers of tube railways, the American entrepreneur, Charles Tyson Yerkes. |
 | | The Piccadilly line was the first of the deep-level tube lines to be converted to oneperson operation (August 1987), where the operator drives the train and controls the operation of the doors. |
 | | Southgate station is in a short separate tunnel section, as is the line beyond Hounslow West serving Hatton Cross, Heathrow Terminals 1, 2, 3 and Heathrow Terminal 4 stations (except for a short section on the surface between Hounslow west and Hatton Cross where the line crosses the River Crane). |
| www.tfl.gov.uk /tube/company/linefacts/?line=piccadilly (915 words) |