Consider these:
and
Note the horizontal rectangular red signs that say "STOP"
I've never seen such a thing!!
Is this unique to the OP&E, or did other railroads use them? Is there a web resource for this and any other signs used for railroads?
(Yes I Googled railroad signs, but all I get are the ones meant to be obeyed by automobiles)

and

Note the horizontal rectangular red signs that say "STOP"
I've never seen such a thing!!

(Yes I Googled railroad signs, but all I get are the ones meant to be obeyed by automobiles)
