You can check the Commuter trains (U Bahn, Tram) in Germany.
Unfortunately, I can't introduce you all cities in Germany...
This video covers Frankfurt am Main, Munich, Bonn, Dortmund, Bochum, Essen, Mulheim, Dusseldorf, Cologne, Krefeld, Dresden, Erfurt, Leipzig, Nurnberg, Augsburg, Ulm, Mannheim, Heidelberg, Mainz, Karlsruhe, Freiburg, Berlin, Hannover, Hamburg.
And most of video was recorded in 2018 or 2019.
So I can't include trains debut in 2020...
But, I hope you enjoy my collection video :)
Thank you !!!
