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RATO 6 / 05-2012
A primary overlap and one or two secondary overlaps must be defined for a main route
(Figure 6.3:16), when
–
the closest powered point in advance of the route exit signal is a route point,
which is a facing point
–
the distance between the route exit signal and the fouling sign point of route point
in advance of the signal is less than 60m and
–
the route point is located on the track section in advance of the route exit signal.
< 60m
Figure 6.3:16 The route has the primary overlap and the secondary overlap.
The conditions for definition of the main route overlap, presented above, are collected in
Appendix 2.
The following conditions must be fulfilled, when the closest powered point in advance of
the route exit signal is a facing point(Figure 6.3:17):
–
The primary overlap must include only the closest track section in advance of the
signal.
–
An effort must be made to determine the position of the route point on the overlap
in such a way that the set overlap prevents as little as possible the setting of
other routes and that the point is in the position leading to the more used route
path.
–
The secondary overlap must include the closest track section in advance of the
signal and as the position of the route point on the overlap must be determined
other than the position on the primary overlap.
–
Two secondary overlaps can be defined, if on the track section in advance of the
route exit signal there are two route points, which are facing points.
Overlap 2
Overlap 1
Overlap 3
Figure 6.3:17 An example of the determining of the primary overlap and the secondary
overlaps.
There has to be a track section in advance of the signal, acting as a primary overlap, if
there is a powered point in advance of the signal and the distance between the signal
and the powered point in advance of the signal is more than 100m.