3 ms·
They might be referring to the signals on the track. https://en.wikipedia.org/wiki/Swiss_railway_signalling https://en.wikipedia.org/wiki/Swiss_railway_signall
by mkr-hn 4y ago
They might be referring to the signals on the track.
https://en.wikipedia.org/wiki/Swiss_railway_signalling https://en.wikipedia.org/wiki/Swiss_railway_signalling