@cstross @Steveg58 I'm not sure whether it happens on the high-speed parts of the line (probably not) or close to the shared stations, but for some reason the Italian high-speed trains do manage to get stopped / slowed down because there are “unauthorized people on the tracks”
I'm not sure whether that's protesters, or a code word for “we had a team doing urgent maintenance on the track, but it wasn't really safe for them to be there, so officially they aren't”