The "attack" is use of standard A 1r 'Alarm' signal for Radio-Stop rail system. Signal described in detail in readily available Ie-1 rail signaling manual, official Ministry of Infrastructure regulations!, EU regulations (https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CEL...) and manuals for rail radio systems. There are multiple YT tutorials going back 10 years. Under one of the recent ones from 9 months ago comments already mention someone being arrested for doing very same thing 3 months prior.
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[ 3.0 ms ] story [ 8.7 ms ] threadProblem is its a simple signal consisting of three standard https://en.wikipedia.org/wiki/Selcall tones. Its same as https://www.dallasnews.com/news/politics/2017/04/12/dallas-s...
Solution is adoption of https://en.wikipedia.org/wiki/GSM-R