Page 171 - IRSEM_Main Book

7.1.19 Subsidiary Signals - Shunt Signal

(a) Shunt movements shall, as far as possible, be controlled by Shunt Signals.
The Shunt Signals shall lock and detect all the points in the Route and
prove that the tracks in the route excluding the berthing track are clear and
that the level crossing gates in the Route are closed and locked against the
road traffic.

(b) Shunt Signals shall be of the Position Light type. The lights of a Position
Light Signal shall be white. Two lights of a Position Light signal shall be
horizontal in the 'ON' position and 45° above the horizontal in the 'OFF'
position.

(c) Placement and aspects of Shunt Signals

(i) Shunt Signals may be separately located on posts or close to the
ground or may be fixed below Stop Signals other than the First Stop
Signal of a station.

(ii) Where a Shunt Signal is required to be fitted on a Signal post on which
a Calling-on signal is also fitted, the Shunt Signal shall be fitted below
the Calling-on Signal.

(iii) A Shunt Signal placed below a Stop Signal or a Calling-on Signal shall
not be capable of being worked at the same time as the relevant Stop
Signal or Calling-on signal.

(iv) Where a Shunt Signal is fixed below a Stop Signal, it shall show no light
in the 'ON' position.

Section 2: Warning Boards

7.2.1 A Warning Board to warn the Loco-pilot of his approaching a Stop Signal shall
be provided at a distance of 1.4 km in rear of the First Stop Signal of a station,
Intermediate Block Stop Signal and Gate Stop Signal. This distance may be
increased suitably to cater for gradients.
Note: (i) On Broad Gauge and Metre Gauge, Passenger Warning Board should be
provided at not less than 1000 m in rear of the first stop signal of a station,
intermediate block stop signal and gate stop signal. The Passenger Warning Board
need not be provided where the distance between distant signal and stop signal is
1000 m or more.

(ii) Goods warning board shall be provided at a distance of 1400 m in rear of the first
stop signal of a station, intermediate block stop signal and gate stop signal.

(iii) In Double Distant Territory, no warning board is required.

7.2.2 In those cases, where Gate Signals and station signals happen to be located
close to each other, only one warning board shall be provided at a distance of
not less than 1.4 km from the First Stop Signal.

Chapter 7: Essentials of Signalling Page 140 of 535