Page 165 - IRSEM_Main Book

7.1.10 Overlap beyond IB signal (Class C station): shall not be less than 400
meters beyond IB home.

GR 8.04: At a class C station on single line or double line, in two aspect, multiple
aspect or modified lower quadrant signalling, the line shall not be considered clear
and line clear shall not be given, unless-

(a) the whole of last preceding train has passed complete at least 400 meters
beyond the home signal and is continuing it`s journey and…..

7.1.11 Visibility of Signals: The minimum visibility distance of various signals shall
be as under;

(a) Distant Signal - 400 meters.

Note: (i) Where it is not possible to obtain 400 meters of continuous visibility (due to site
constraints), then imposition of a suitable speed restriction may be considered.
(ii) An Inner Distant Signal (where provided), shall be continuously visible from a
minimum distance of 200 meters.

(b) All Stop Signals - 200 meters.

Note: Where it is not possible to obtain 200 meters of continuous visibility of any stop
Signal (due to site constraints), then a suitable speed restriction shall be imposed.

7.1.12 Aspects of Signals

(a) Aspects of Distant Signals

(i) In Single Distant Territory:
 The Distant signal shall display; a yellow light (bottom) in the 'ON'

position 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.

(ii) In Double Distant Territory:

 The Distant signal shall display; two yellow lights in a vertical line
(Distinguishably apart) in the 'ON' position for the 'Attention' aspect,
and one green light for the 'Proceed' aspect.

 Inner Distant signal shall display; a yellow light (bottom) in the 'ON'
position 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. Inner Distant signal shall display the same
aspects as that of Distant signal in Single Distant territory.

Chapter 7: Essentials of Signalling Page 134 of 535