Not sure what we're doing tonight, but I found an addon that's very helpful.
It has a graphic showing incoming trains, etc, but the most useful feature is it will give you an audible alert (bells ringing, and DESTRUCTION!) if you are on a bad track. Pug did it on heroic, 1 shot, with no train deaths and no voice. Raid leader insisted everyone had this addon rather than voice.
It would make Celsh's job much easier, for sure, not having to call out train tracks.