Permissive signal
Permissive signal
A signal aspect or a signal identification, which enables a main signal to be passed at danger under special conditions, without specific permission from the signalman.
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ERTMS/ETCS - Glossary of Terms and Abbreviations - version : 4.0.0 - date 05/07/2023
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ERTMS/ETCS - Glossary of Terms and Abbreviations - version : 4.0.0 - date 05/07/2023
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