OWB – Quiet Trains
This mod removes the sound from the trains and wagon models from the mod old world blues.
OWB replaces the train and train car gfx models with the motorcycle and car models/entities. Unfortunately owb uses those entities unaltered and the unaltered entities use a fairly loud sound effect when they move multiplied by the half a dozen or so models that are spawned as the "train". So when you were zoomed in at all the only thing you would be able to hear was motorized movement sounds.