Just thought it would be appropriate to post a warning about railroad tracks. Caches placed near active railroad tracks are now verboten - but I notice that a lot of the benchmarks I look up are located a few feet from active tracks.
Legally as well as safety-wise, you don't want to be anywhere near railroad tracks. Bad news all around. After reading up on it, my inclination is, aside from no tresspassing signs and fences, keep at least 50' from the tracks, preferably 150', unless you're obviously on safe ground (a parking lot or sidewalk, for example).
Perhaps it would be a good idea to post a note when you seek a benchmark and it turns out to be on railroad property; that's what I've been doing.