Hi, I just noticed after i've set a service in winter time and while i was walking on the platform i heard the walking sound that you would hear when walking in snow not concrete, tho the station was concrete.
Yes, because it's the same sounds across the whole of the route, if you walk on the ballast and footpaths, where there is snow, you will hear the same sound. They don't alter the sounds for the concrete platforms, as some of them are undercover, of course, especially, in the big stations and are not covered in snow anyway, it's how they have developed the game.