[jacquesm]

You're an engineer in the passenger rail industry in Poland? If not then you probably will want to familiarize yourself with the state of Polish rail infra before commenting further. It's a small miracle they don't have more accidents than they already do.

The most recent major incident is two months ago:

https://apnews.com/article/poland-train-accident-1db1a088c31...

And there are plenty of others to choose from:

https://en.wikipedia.org/wiki/Category:Railway_accidents_and...

There are only two countries in the EU that have worse rail infra than Poland (Romania, Bulgaria). Rolling stock is off mixed quality and vintage, maintenance spotty at best.