> Has there really never been a single occurrence of a passenger train clearing the tracks in history? I'm not sure if it was ever used while the train was al

> Has there really never been a single occurrence of a passenger train clearing the tracks in history? I'm not sure if it was ever used while the train was also moving passengers, but I'm aware of at least a special cleaning wagon nicknamed "Schrubbi" operated by the S-Bahn Hamburg[1]. It's a repurposed passenger wagon that contains a large water tank and uses pressurized water to clean tracks. In theory you could add that to a regular passenger train, subject to some speed limits (like the tech in the article), but in practice I don't know whether that ever happened. Because of the speed limit required to get decent results, I have doubts any such tech will be used outside of special cleaning trains... Also I suppose there's snow plows on passenger trains, though nowadays that's probably also (mainly) done by specialized trains. Does this[2] count as cleaning? [1]: https://s-bahn.hamburg/magazin/s-bahn/betrieb-und-technik/der-herbst-der-herbst-der-herbst-ist-da.html https://s-bahn.hamburg/magazin/s-bahn/betrieb-und-technik/de... [2]: https://www.youtube.com/watch?v=V-Cb9x70gYQ https://www.youtube.com/watch?v=V-Cb9x70gYQ