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Belgium
a
SpeCtS
In general high signals can show the
following aspects:
aspect
red:
absolute stop
green:
proceed
double yellow (DY):
next signal must be expected to
show "Stop"
green yellow horizontal (GYH):
approach slow
green yellow vertical (GYV):
advance approach
red white (RW):
normal
shunt ahead
voie
signal
normal
double green (DG):
160 km/h authorized
voie
signal
There are three approach aspects. Two
normal
yellows is the ordinary approach: proceed
voie
prepared to stop at the next signal. A green
signal
and a yellow in a horizontal alignment
means approach next signal at slow
approach
speed, 40 km/h unless otherwise indicated.
signal
Illuminated speed indicators may change
the speed.
The aspect called advance approach is
approach
main
often used where full braking distance is
signal
signal
not provided, and can mean essentially
4
stop at the second signal.
84
4
normal
voie
normal
signal
voie
signal
normal
voie
signal
normal
approach
voie
signal
approach
approach
contre
signal
voie
signal
4
normal
approach
approach
main
contre
voie
4
signal
signal
signal
voie
signal
signal
4
normal
combined
main
voie
signal
signal
signal
4
4
approach
A2
combined
A1
A0
signal
A3
A4
approach
A2
A1
signal
A0
4
A3
A4
Belgian signals
The double green aspect is used on lines
signalled for 140 km/h allowing 160 km/h
operation. It is always followed by another
double green or a single-green proceed,
so that additional braking distance is
provided.
As in German practice, two kinds of
movements
are
movements
and
Shunting movements always proceed at
restricted speed (marche à vue, maximum
40 km/h), and within defi nite limits. To
allow shunting movements but not train
normal
movements, the white light is illuminated
voie
as shown. A movement passing a high
signal
signal at Proceed automatically is classed
as a train movement, while a movement
proceeding on the shunt ahead aspect is
classed as a shunting movement. High
signals can change the type of a movement.
a
-
s
approach
dd
on
Ignals
contre
There are some signals that give additional
signal
voie
information. They are mounted either
signal
below or above the main signal.
contre
signal
main
contre
voie
signal
signal
voie
speed announcement
4
signal
main
signal
The digit gives the permissible
signal
signal
speed in units of 10 km/h.
combined
main
chevron: change tracks
signal
signal
Crossover movements are
preceded by the white chevron at
the top of the signal. This chevron,
A2
combined
main
combined
of course, is never shown above a
A1
signal
signal
A0
signal
signal at Stop.
A3
„U signal"
A4
A2
contre
In the same place as the chevron
A2
A1
A1
may be an illuminated „U" for
voie
A0
A0
a track of limited length, or a
signal
A3
A3
straight horizontal line indicating
A4
A4
very short braking distance.
main
A disturbed (dark) signal is of
signal
signal
course no add-on signal, but an
error.
a dark background by an accessory
combined
main
command.
signal
signal
A2
distinguished:
shunting
movements.
contre
voie
signal
contre
voie
contre
signal
voie
combined
main
signal
signal
signal
A2
A1
combined
impact
A0
signal
A3
combined
A4
signal
A2
A1
A0
A2
A3
A1
A4
A0
contre
A3
voie
A4
signal
combined
signal
Qdecoders
can switch to
A2
A1
A0
A3
A4
train
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