Gathering information for routes

I'm not sure where to post this but this seems like to appropriate spot. Anyway when people start a route how do you get information? I'm working on a shortline near where I live but I can't find information on it. So how do you find information on your routes? Do you go to the line itself? Contact the lines operator?(Currently they're ignoring all form of contact with me)? I'd love to know how everyone gets information on the routes you make.