#puzzled by PZB activation

7 messages · Page 1 of 1 (latest)

clear kiln
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It was a speed trap (the two magnets close together at around 11s). As you can see in the top right, you are approaching a 110 km/h speed limit and there should have been a sign earlier announcing that (but maybe that was missing for some reason). You drove a bit too quick over that speed check (I think the tolerance is 20 km/h) and therefore got the emergency brake application. Next time brake a bit earlier and you should be fine

clear kiln
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Yes the UI doesn't show that you are too fast yet (since you haven't entered the new speed limit yet), but iirc these speed traps are set at points where it is especially dangerous to be speeding (in this case the upcoming turn) and where you can't hit the target speed anymore without applying heavy (or even emergency) brakes. I don't think there is some sort of indication for them, you just have to learn where they are and then remember to brake earlier than what when you are used to. I generally start braking as soon as I pass (or in a heavy train see) the sign that announces the speed reduction (regardless if there are upcoming speed traps or not) and never really have issues with them. More information about how it works irl can be found here: https://en.wikipedia.org/wiki/Punktförmige_Zugbeeinflussung#Speed_traps

Punktförmige Zugbeeinflussung

PZB or Indusi is an intermittent cab signalling system and train protection system used in Germany, Austria, Slovenia, Croatia, Romania, Israel, Serbia, on two lines in Hungary, on the Tyne and Wear Metro in the UK, and formerly on the Trillium Line in Canada.
Developed in Germany, the historic short name Indusi was derived from German Induktive...

real drum
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The speed trap is kind of like a speed check when approaching a signal as the wiki says. The trap is triggered when the first magnet is passed, which causes a third magnet further down the track to give off a 2000hz signal. This signal disappears after a set amount of time based on the expected speed of the train at that point which is based on the expected brake curve for the speed reduction. If you’re travelling too fast, then you reach the third magnet faster, meaning that it has not deactivated yet, so you catch the 2000hz signal and you get braked

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Oh yeah that’s a good point

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There was nothing to be acknowledged clearly so the 1000hz light shouldn’t be flashing

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It’s probably another one of DTGs bugs

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2000hz indicator is redundant and doesn’t actually exist, but there is an S indicator which essentially serves the same function