Earlier quoted context omitted.
> The main cause (often somewhat hidden behind the term "decayed infrastructure") is that there are too many trains on too few tracks. Do you have a citation for this? The people I know from the DB bubble are telling me that while some places have not enough track (e.g. the infamous Frankfurt-Mannheim/Riedbahn), but the everywhere problem is that there's just fault over fault over fault in tracks (often switches, but…
> Do you have a citation for this? I don't, this is just my personal experience with passenger rail in southwestern Germany. The smaller lines with 1-2 trains per hour are usually extremely reliable, while the lines on crowded tracks are usually delayed, or cancelled completely. Note that many of the reliable lines I regularly used over the past 10-15 years ran on track equipment from the 19th century, some still wit…
Btw. Wooden sleepers laid in the 19th century have completely rotted away by now; it's impossible for the line track itself to be that old (except very slow speed shunting tracks, maybe.)