Do you have a link?
Was it similar to what we’re seeing now (nationwide, radio related)?
https://hackaday.com/2023/08/29/polish-railways-fall-victim-...
tl;dr: Trains can be stopped by a transmitting a simple, documented tone sequence over analog radio.
alt Hacker News
https://hackaday.com/2023/08/29/polish-railways-fall-victim-...
tl;dr: Trains can be stopped by a transmitting a simple, documented tone sequence over analog radio.