Download 6 signalling systems

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RATO 6.4 Positioning of signalling apparatuses
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The effect of electrified railway structures.
The effect of signal balises.
The effect of rail gradient.
The effect of a passenger platform.
The effect of a level crossing.
The positioning in relation to the line point.
The line block entry signal must be positioned in the same way as the main
signal for the part of the following requirements:
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The sighting distance requirement.
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The effect of signal balises.
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The effect of a level crossing.
A block signal must not be positioned at a point.
A block signal must be positioned at such a distance, in the direction to the track,
from the catenary support or catenary bridge cantilever, that the block signal
does not prevent the cantilever from moving. An effort should be made to
position a block signal parallel to the track at least 5m distance from the catenary
support or catenary bridge cantilever.
A block signal must be positioned in the same way as a distant signal for the part
of the requirements for presignalling distance.
6.4.5.2.2 Effect of other signalling systems planning on block signal
positioning
In positioning a block signal, it must be taken into account that the positioning of
the block signal affects the positioning and planning of other signalling
elements.
In positioning a block signal, it must be taken into account that the signal
displaying the distant signal information of the block signal can be positioned
according to the requirements for positioning the signal in question.
A block signal may be the signal displaying the distant signal information of the
next main or block signal. The presignalling distance may be a maximum of
2.5km.
The distance between the block signal and separate distant signal, which refers
to the next main or block signal, must be at least 500m or the distant signal,
which refers to the next main or block signal, may not be visible from the length
of track in rear of the block signal, which is prior to the distant signal.
In positioning a block signal, it must be taken into account that the release speed
of the main signal is such that the typical traffic on the track the signal is
referring to, enables the capacity requirements stated in the engineering
configuration requirements to be fulfilled. An effort should be made to position a
block signal and plan its overlaps to make it possible primarily the use of the
calculated release speed and secondly the fixed release speed of 35kph. An effort
RATO 6 2009-12