3 ms·

I don't know the French way, but coming form Germany: For logner tunnels etc there is an override, where emergency break doesn't break immediately as stopping

I don't know the French way, but coming form Germany: For logner tunnels etc there is an override, where emergency break doesn't break immediately as stopping a train mid-tunnel is most of the time the worst choice. Smoke in tunnel is dangerous. Emergency help can't reach it. Evacuation has confined space. etc. There emergency break rings an alarm with the engineer. If they ignore it, it will stop after a while, but usually they will use intercomm to understand the reason. A way however you can stop trains on a German train line is by putting a 2kHz electromagnet on the tracks. That will tell the train that it just crossed a red signal and will stop.

jacquesm 3y ago
Please edit your comment and take that info out. I understand you mean well but spreading this is stupendously risky.
- amenhotep 3y ago
  You realise you can just look this stuff up? https://en.wikipedia.org/wiki/Punktf%C3%B6rmige_Zugbeeinflussung https://en.wikipedia.org/wiki/Punktf%C3%B6rmige_Zugbeeinflus... Crusade against Wikipedia that the information is stupendously risky if you think that's a good use of your time.
  - jacquesm 3y ago
    Yes, I do realize that. The fact that other parties are irresponsible is no reason to join in.
    - throw_a_grenade 3y ago
      How irresponsible of (gasp) European Commision to publish the exact specification (frequencies and timings of the tones) of the command used in this attack (in Poland): https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=OJ:L:2006:342:FULL https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=OJ:L... (p. L 342/109-110, or ^F RADIOSTOP) This is Official Journal, available in all EU languages (at the time).
- johannes1234321 3y ago
  This is well documented in each railway publication. Also the risk is .... not existent. To damage railway infrastructure there are way more efficient and simple ways (getting a rail to derail, destroy some signaling cables, ...) The "attack" here would require quite some investment in equipment (power etc.) and only bring a single train to a realtively quick stop, well in safe margins, where the driver after a quick check with the dispatcher can override and continue the ride, while investigators would collect the equipment. It's impractical for a stunt (way simpler and more effective: just walk close to the tracks and they will do emergency stops for all trains close by) and ineffective for an attack.
  - jacquesm 3y ago
    Yes, there are other ways to bring trains to a halt or to derail them. Even so I think it is irresponsible to spread such information further than it has to go, especially on a site called 'hacker news', and even more so in a thread where people are openly arguing that insecure systems should be replaced by more secure ones. Rail infra is not as easy to update as your average web based project and keeping such information out of the hands of would-be experimenters can only be good. No downside, possible upside: easy decision.

jacquesm 3y ago

Please edit your comment and take that info out. I understand you mean well but spreading this is stupendously risky.

amenhotep 3y ago
You realise you can just look this stuff up? https://en.wikipedia.org/wiki/Punktf%C3%B6rmige_Zugbeeinflussung https://en.wikipedia.org/wiki/Punktf%C3%B6rmige_Zugbeeinflus... Crusade against Wikipedia that the information is stupendously risky if you think that's a good use of your time.
- jacquesm 3y ago
  Yes, I do realize that. The fact that other parties are irresponsible is no reason to join in.
  - throw_a_grenade 3y ago
    How irresponsible of (gasp) European Commision to publish the exact specification (frequencies and timings of the tones) of the command used in this attack (in Poland): https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=OJ:L:2006:342:FULL https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=OJ:L... (p. L 342/109-110, or ^F RADIOSTOP) This is Official Journal, available in all EU languages (at the time).
johannes1234321 3y ago
This is well documented in each railway publication. Also the risk is .... not existent. To damage railway infrastructure there are way more efficient and simple ways (getting a rail to derail, destroy some signaling cables, ...) The "attack" here would require quite some investment in equipment (power etc.) and only bring a single train to a realtively quick stop, well in safe margins, where the driver after a quick check with the dispatcher can override and continue the ride, while investigators would collect the equipment. It's impractical for a stunt (way simpler and more effective: just walk close to the tracks and they will do emergency stops for all trains close by) and ineffective for an attack.
- jacquesm 3y ago
  Yes, there are other ways to bring trains to a halt or to derail them. Even so I think it is irresponsible to spread such information further than it has to go, especially on a site called 'hacker news', and even more so in a thread where people are openly arguing that insecure systems should be replaced by more secure ones. Rail infra is not as easy to update as your average web based project and keeping such information out of the hands of would-be experimenters can only be good. No downside, possible upside: easy decision.