Railway signal number resources

Hi! I’m currently tagging railway signals in Greater Montreal, and can’t always see the signal (ref) number from a publicly accessible location. Is there any public resource for track maps where that information would be freely available? I would tend to doubt so, but I was wondering.

There isn’t really any official sources, as railways don’t share this data.

There might be some resources in the Canadian Trackside Guide

Street level imagery (that is compatible with OSM) and on site surveys are the only options

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