News for hackers. Stuff that matters.

A comment on Spain train crash: What we know after two trains crashed with dozens feared dead. Parent comment

Re:Spain train crash: What we know after two trains crashed ... by fn-mote on Thursday October 29, 2026 @07:40AM (#50287442)
> Detecting objects (and future objects!) on a train track is still a hard problem.

In this case the “object” was another train. That’s not the “hard” part of the problem. This sounds like an apologist comment.

[ Parent | on HN ]
Re:Spain train crash: What we know after two trains crashed ... by dns_snek on Thursday October 29, 2026 @08:17AM (#50287760)
What difference does that make, genuinely?

Are there systems that can warn drivers and prevent collisions without external signaling, like ACAS?

[ Parent | on HN ]
Re:Spain train crash: What we know after two trains crashed ... by 1718627440 on Thursday October 29, 2026 @08:30AM (#50287892)
Yeah, that's a solved problem. Did you even read my whole comment? I answered why "just use the system from self-driving cars" wouldn't work and in fact would be less safe than the current system.
[ Parent | on HN ]
Re:Spain train crash: What we know after two trains crashed ... by AnimalMuppet on Thursday October 29, 2026 @01:38PM (#50292959)
What's the stopping distance of a high-speed train at full speed? I don't know, but I bet it's kilometers, not meters.

Detecting an object on the tracks 2 km away (say), as opposed to beside the track at the same distance, is in fact a hard problem. The tech used in self-driving cars is not going to solve it.

[ Parent | on HN ]