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Trains cancelled over fake bridge collapse image

(www.bbc.com)
263 points josephcsible | 1 comments | 07 Dec 25 00:37 UTC | HN request time: 0.215s | source
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mr_windfrog ◴[07 Dec 25 03:12 UTC] No.46178827[source]▶
What this incident really shows is the growing gap between how easy it is to create a convincing warning and how costly it is to verify what's actually happening. Hoaxes aren't new, but generative tools make fabrication almost free and massively increase the volume.

The rail operator didn't do anything wrong. After an earthquake and a realistic-looking image, the only responsible action is to treat it as potentially real and inspect the track.

This wasn't catastrophic, but it's a preview of a world where a single person can cheaply trigger high-cost responses. The systems we build will have to adapt, not by ignoring social media reports, but by developing faster, more resilient ways to distinguish signal from noise.

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belorn ◴[07 Dec 25 10:17 UTC] No.46180642[source]▶
Given the number of cctv cameras that operate in the UK, and their continued growth, I am surprised that the rail operator did not have access to a direct view of the bridge. I am also a bit surprised that there isn't technology to detect rail damage, especially the power lines that runs over the track.

Where I live it is not uncommon for rail to have detection for people walking on the rail, and bridges to have extra protection against jumpers. I wouldn't be that surprised if the same system can be used to verify damage.

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1. pmyteh ◴[07 Dec 25 13:25 UTC] No.46181516[source]▶
There is technology that could detect rail breaks, in the form of track circuits: feed a current into a rail, detect whether it gets to the other end (or bridge the two rails at the other end of the circuit and see if it gets back to the start of the other rail). A variation of this is commonly used in signalling systems to verify that the track is clear: if a pair of wheels is in the track section then the signal will short across the rails and make the circuit show 'occupied'.

Ultimately, though, this kind of stuff is expensive (semi-bespoke safety-critical equipment every few miles across an enormous network) and doesn't reduce all risks. Landslides don't necessarily break rails (but can cause derailments), embankments and bridges can get washed out but the track remains hanging, and lots of other failure modes.

There are definitely also systems to confirm that the power lines aren't down, but unfortunately the wires can stay up and the track be damaged or vice versa, so proving one doesn't prove the other. CCTV is probably a better bet, but that's still a truly enormous number of cameras, plus running power supplies all along the railway and ensuring a data link, plus monitoring.