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In the mid-1950s there were rumours that the Northern line was to be upgraded from manual operation to an automated line. This involved twelve manned signal boxes with a total of forty-one signalmen - eventually reduced to thirteen signalmen after automation.Automating the Northern Line describes how the line was operated manually - then progressed via the various stages involved in the modernisation to a fully automated line - from the point of view of a signalman/regulating room operator who was working on the line throughout the whole period. This book explains - with the help of photographs - the technology involved - including the test machinery initially used - and also the difficulties encountered by the staff who had to operate this new control system.... Please click here to ask a question
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