Tracklayer asked this a few days ago…
"So what does a triangle shaped sign with a black dot in the center mean ?..
Tracklayer"
Anyone know?
Tracklayer: Where was it?
I have no idea
Maybe try the trains forum…
SP used a triangle w/ a “P” on it to designate a signal that could be passed at retricted speed if red. Generally on an upgrade. We’d really have to know what RR and where ir was located