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Railway Interlocking system is the most fundamental and important part of railway signaling system. It ensures the safety of train movement. With the development of railway signaling system, it has experienced three stages: mechanical interlocking system, relay interlocking system and computer-based interlocking system. On the basis of reviewing the history of railway signal development, this paper introduces the development of interlocking system and discusses the future development direction of railway interlocking system.
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Lujiang Huang (2020) studied this question.