Essentials
of Automatic Block System –Double Line (Rule 9.01)
- Line
shall be provided with continuous track circuiting or axle counters.
- Line
between adjacent block stations may, where required be divided into
signalling sections by provision of Automatic Stop Signals.
- Entry
of train into each signalling section is controlled by a stop signal.
- The
Signal shall not assume “OFF” aspect unless the line is clear up to the
next Automatic Stop Signal plus an adequate distance.
- The
Signal shall assume “ON” aspect automatically as soon as the train passes
it.
- Unless
relaxation is given by CRS the adequate distance mentioned above shall not
be less than 120 metres.
Essentials of Automatic Block System -
Single Line (Rule 9.03)
- The
Line shall be provided with continuous track circuiting or axle counters.
- The
Direction of traffic shall be established only after the Line clear has
been obtained from the block station in advance.
- A
train shall be started from one block station to another only after the
direction of traffic has been established.
- It
shall not be possible to obtain Line clear from the station in advance
unless the line is clear up to the FSS plus an adequate distance beyond
it.
- The
line between two adjacent block stations may where required be divided
into two or more Automatic block signalling sections by provision of Stop
Signals.
- After
the direction of traffic has been established movement of trains into,
through and out of each signalling section shall be controlled by the
concerned automatic stop signal.
- The
said signal shall not assume “OFF” aspect unless the line is clear up to
the next Automatic stop signal.
- But
if the next stop signal is a manually controlled one the line must be
clear up to the manual signal plus an adequate distance.
- All
signals against the direction of traffic shall be kept at “ON”.
10. Unless relaxation is given by CRS the
adequate distance mentioned above shall
not be less than 180 metres.
