Ever since the first railways it has been necessary to ensure than two trains do not attempt to occupy the same section of track at the same time. At first, control was rudimentary, but as steam replaced the horse and trains became faster, signalling systems quickly developed. However, it was not until a tragic accident occurred at Armagh in 1889 that legislation regarding train control began to take effect. Today, centralised control and a high degree of automation are used, with some metro lines even running without ...

US Rangers: Leading the Way 2009, Ian Allan Publishing

ISBN-13: 9780711029781

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