What if the player forgets, or irresponsibly places signals that don’t actually show a trains correct location. Or perhaps Very rarely get a message that a signal disabled and that it needs to be replaced, and if not replaced in time a train runs threw the light possibly into the back of another train.

Also track that has been used normally or much that it causes track breakage under the trains wait? – a possible way to prevent that would having a track team in the depot that runs out and patches the track as it goes( but not to be a constant thing, to be a rare issues, if 1 track cleaning goes around maybe every 30 minutes.

I know my ideas sound insane, but it adds to the realism of trains, and would create difficulty to deal with besides making a profitable cargo/passenger company. I’m not asking for gory stuff, maybe a fire here n there from tanker cars and engines, lol