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According to the linked press release[1]: > ... faulty train signalling hardware on PV46 was emitting erroneous signals in addition to the ones it was supposed
by waffle_ss 10y ago
According to the linked press release[1]:
> ... faulty train signalling hardware on PV46 was emitting erroneous signals in addition to the ones it was supposed to emit. These erroneous signals occasionally prevented trains travelling in the vicinity of PV46, including in the opposite direction, from properly communicating with the trackside signalling system. This loss of communications led to the activation of the trains’ emergency brakes.
[1]: https://www.lta.gov.sg/apps/news/page.aspx?c=2&id=89defe38-427b-4cfe-b69d-4e35ca7d0f64 https://www.lta.gov.sg/apps/news/page.aspx?c=2&id=89defe38-4...
- djsumdog 10y agoThanks! I was like, I got to the end of the article and they didn't tell us what the issue with the train was. :-P
- gojomo 10y agoSounds like it may have been sending an (off-by-one, inverted, etc) signal indicating it's on a different track, or moving a different direction or speed, than it was in reality. While the press release says these were "in addition to the ones it was supposed to emit", it's not hard to imagine that a similar error could happen where the wrong signals were sent in-lieu-of the intended signals, and thus leave trains rolling that should have detected an emergency-stop situation.