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| | British Railways in Wartime, 1943 |
 | | The practical knowledge and experience of train working methods, signalling systems, motive power, and staff, and of the physical conditions of each locality, enable the railway operating staffs to make the best possible use of every piece of rolling stock, section of line, ounce of motive power and staff available. |
 | | Developments in railway signalling, such as the widespread use of electrical, colour light and power installations; scientific shunting at modernised marshalling yards; the welding of rails; and the introduction of labour-saving appliances for all kinds of purposes, were also subjects of close study. |
 | | Electrical power, in addition to sending messages, has been adopted to save time and labour by setting points at considerable distances, and the widespread use of colour light signals has proved of great value in keeping traffic moving in all kinds of weather. |
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