That's kinda funny, because I thought she sounded a bit like Janeane Garofalo when she was reading out the train numbers in a deadpan tone.
I don't want to support her outright, but I think she does have a point. Obviously it's not the regular loud train noises that are bothersome (e.g the clickety clacking of the rails - which seems louder than the horn), but the irregularity of the high-pitched horn blasts. Dull roars from a highway, trains, rails are predictable and regular. Tooting horns with interspersed toots only when kids are on a bridge...not so much. I personally don't mind loud noises, but I absolutely hate when these noises come on all of a sudden (e.g a neighbour's dog barking, or another neighbour's motion-activated garden pest alarm).