Comment by 1718627440

No, the line based control system is the normally used one, because it is required for high-speed. But both systems are safe on their own. I explained it in more detail here: https://news.ycombinator.com/item?id=50298796

> Some reports said that the renfe train rolled for 25km - if this is what their fallback is like - it is absolutely inexcusable. Oh my...

I do not know what you mean with that, and what "rolling" would mean here.