Signal passed at danger

A signal passed at danger (SPAD), in British railway terminology, occurs when a train passes a stop signal without authority to do so. It is a term primarily used within the British railway industry, although it is also used in some other countries.

单词	Flank protection
释义	Flank protection 英语百科 Signal passed at danger A signal passed at danger (SPAD), in British railway terminology, occurs when a train passes a stop signal without authority to do so. It is a term primarily used within the British railway industry, although it is also used in some other countries.
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Flank protection

Signal passed at danger