Submitted by: David K.
Getting Started with LZB:
Written by Taschi
A quick guide that should tell you all you need to know about how to drive
with LZB in-cab signalling.
-=What Is LZB?=-
LZB is a system for in-cab signalling and enforcement of maximum speeds and braking
curves which is in widespread use in Germany and Austria. Any operation of trains
above 160km/h in those countries is required to have either LZB or its successor,
-=How to Drive with LZB=-
Once you enter an LZB area, which is indicated by a sign saying "LZB" on it (those
are repeated every couple of kilometers for reasons you don't need to know right
now), a couple of things should happen:
The "Ü" indicator should light up, indicating that a transmission channel
("Übertragung") is established.
A bar next to the speedometer lights up, showing you the distance to the next change
of your maximum speed (in the LZB version used in TSW, only reductions of the
maximum speed are indicated in advance). If the distance is above 4km, the distance
will be shown as a number above that bar (up to 9900m on the 406 / ICE M). If the
number stays at the maximum value, no speed changes are upcoming in the forseeable
A three-digit number will show up below the tachometer. That number is the upcoming
speed restriction. If no speed restriction is upcoming (distance indicator at max
value), the current speed restriction will be shown instead (If the number is 000,
you're supposed to stop at the target distance).
A little triangle indicator will show up along your speedometer's edge. That is
your current maximum speed, calculated in real-time based on the upcoming speed
restriction, the distance to that restriction, and your train's braking capabilities.
Always stay below the triangle indicator. If you're above, the train will beep at
you. If you're too much above, the train will forcibly brake you down.
If you're approaching a speed restriction, the red indicator labelled "G" (don't
ask what that stands for) indicates that, within the next ten seconds (?), your
current speed trajectory will run above the triangle indicator, so you should start
The LZB braking curves are *very* generous, you generally can follow it at around
a half brake application on the 406 / ICE M.
While you have active LZB guidance, trackside signals and signal boards are
irrelevant. If the LZB tells you to go past a red signal, you are allowed to do
so. If the LZB tells you to go past the signalled maximum speed, you are allowed
to do so (and, in fact, maximum speeds above 160km/h are *never* signalled in
Germany, with a single exception you do not need to know about right now).
-=The End Procedure=-
Once you approach the end of coverage, the train will beep at you and the yellow
"Ende" indicator (meaning "End") will light up. Use the "Frei" key ( "End" on the
keyboard) to acknowledge this and avoid a forced brake application.
From this point on, observe trackside signals. The LZB is still overruling them,
but as soon as you drop out of LZB coverage, you will be bound by trackside
There's a bug here in the sim: in reality, the distance indicator would show you
the distance to the end of the LZB covered area.
What to Do with a Forced Brake Application
Wait until you're stopped, press "Frei" ("End" on your keyboard), release the
brake, carry on.
This of course does not cover all the fun situations that can occur with the LZB
in real life, but should be all you need in the simulator.
By the way, I did not mention the "B" indicator - it merely means that the LZB
is operational, and should always be lit unless you have security systems turned
off, or (in real life) there is a fault.