Let them ride "buffer to buffer" in a convoy instead of this miles long "reserved block" thing from the last century ( https://de.wikipedia.org/wiki/Fahrdienstvorschrift / https://de.wikipedia.org/wiki/Signalbuch_(Eisenbahn / https://de.wikipedia.org/wiki/Betriebsverfahren ). Maybe with 100 to 200 meters distance between them, to compensate for any latencies the electronics, https://de.wikipedia.org/wiki/ETCS_Level_3 , whatever may have. As capabilities(top-speed/acceleration/lenght/breaking distances( https://de.wikipedia.org/wiki/Bremszettel ) permit. Transmit these capabilities autmagically between the trains and the control centers (https://de.wikipedia.org/wiki/Befehl_(Eisenbahn). OFC it makes no sense to have an ICE running behind the S-Bahn, but they mostly have their own tracks anyway.

Re-reading up on ETCS-Level3, that would enable all of this. We're just fucking slow to implement it, while having let our infrastructure decay, and intentionally built back. Like switches to change tracks, for overtaking slower trains, if the other side is free, too expensive to maintain, da da da ah jetzt ja! Dumm gelaufen...

Selbst Schuld Ihr Arschkrampen!

ALAAF!

And finally fence all that shit in, and let the rats and crows have their fun with all the suicidals. No need to close the track. Light a candle, if you must, just another one bites the dust. Yawn.