IEVref:
821-02-91
ID:
Language:
en
Status:
Standard
Term:
permissive signal, <in a block system>
Synonym1:
Synonym2:
Synonym3:
Symbol:
Definition:
signal which may be passed, when it is at danger, under certain conditions, without specific permission
Publication
date
:
2017-11-20
Source
Replaces:
Internal notes:
CO remarks:
TC/SC remarks:
VT remarks:
Domain1:
Domain2:
Domain3:
Domain4:
Domain5:
signal which may be passed, when it is at danger, under certain conditions, without specific permission