Also known as rail transport signal
optical, acoustic or electronic signal providing information about the state of a railway line
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A railway signal is a visual display device that conveys instructions or provides warning of instructions regarding the driver's authority to proceed. The driver interprets the signal's indication and acts accordingly. Typically, a signal might inform the driver of the speed at which the train may safely proceed or it may instruct the driver to stop.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).