^Mmm Ben, well yeah, but when it comes to common sense, any country should apply the same rules.
What Erol said also applies, speaking from my experience, to Tibidabo. When someone is doing inspections or trackwalking a track (Tibidabo Express or Muntanya Russa) we ALWAYS have to check the operational status of the ride. If someone is doing ANYTHING there's a red disk that has to be put next to the panel warning anyone approaching the panel that the ride is not ready for whatever reasons. When the tracks are clear, the engineer must turn the disk to the green side. It is that easy.
Yet, I think this engineer might not have followed safety instructions. Maybe he didn't tell anyone that he had gone back to the track to do a quick check and someone sent the train.
Either way, I am sorry for his relatives.