Page 166 - IRSEM_Main Book

Note: Under approved special instructions, a colour light Distant signal may be
combined with the last Stop signal of a station in rear or with an Intermediate
Block signal or with a Stop signal protecting a level crossing. When a colour light
Distant signal is combined, (i) with the last Stop signal of a station in rear or (ii)
with an Intermediate Block signal or (iii) with a Stop signal protecting a level-
crossing, arrangements shall be such that the signal shall not display a less
restrictive aspect than the stop aspect till Line Clear has been obtained from the
station ahead as in case of (i) and (ii) above and until the level-crossing gates
have been closed and locked for the passage of trains as in case of (iii) above
(Ref: GR: 3.07(7) , G.S.R. 157(E).-Dated-05-3-21)

(b) Aspects of Stop Signals
The signal shall display, a red light for the 'Stop’ aspect, a yellow light for the
'Caution' aspect, two yellow lights in a vertical line (Distinguishably apart) for
the 'Attention' aspect and one green light for the 'Proceed' aspect.
Note: In a typical station(in Double Distant Territory), signals display as under.

Table-1
* Inner
Distant Main Line Loop Line Advanced Indication to Loco
S.No. Distant Home signal
signal Starter Starter Starter Pilot
signal
Double Stop dead at Home
1. Yellow Red - - -
Yellow
Double Stop dead at Main
2. Green Yellow Red - -
Yellow line Starter
Green Green Green Green - Green Run through on
3.
Main Line
Yellow with Stop dead at loop
Double Double
4. Route - Red - line starter
Yellow yellow
indicator
Yellow with Run through via
Double Double
5. Route - Yellow Green loop line
Yellow Yellow
indicator
* Or Distant Signal in Single Distant Territory

Signal Aspect Lamp lit

Stop Red

Caution Yellow

Attention Double Yellow

Proceed Green

Chapter 7: Essentials of Signalling Page 135 of 535