Everytime i wait for the Sbahn i can watch some trains passing by the station with high speed.(Around 120km/h i think). A few seconds before this happens the rail and the OHLE produces a clinging metal echo like sound, thats caused by the speed and weight of the train. A few days ago i bought TS Classic and i noticed this railecho partly exists in the game. Now i make the suggestion to implement this as a feature in Tsw. There already is a little noise the train produces before passing by, but i think this is just the engine sounds and not this metal like echo. I think this feature would add a major part to the immersion and realism of Tsw. I dont know how complicated this is but it works in TS Classic too, so i hope its not impossible.