Page 352 - IRSEM_Main Book

(b) On sections provided with two aspect Signalling:

(i) The Outer Signal shall be located at a minimum distance of 400 meters
from the gate.

(ii) Where the Outer Signal cannot be so located and the Outer Signal falls
in between Home Signal and Gate, a separate Gate signal may be
located at a distance of 400 meters in rear of the gate.

(iii) Where there is adequate visibility of the Outer Signal (1.2 km if sectional
speed is 100 kmph above and 0.8 km if sectional speed is less than 100
kmph) the Gate Signal shall work independent of the Outer Signal.

(iv) Where the visibility of Outer Signal is not adequate, the Outer Signal
shall be shifted and combined with the Gate Signal where feasible or
inter-slotting arrangement shall be provided between the Outer Signal
and the Gate Signal.

(c) On sections provided with Multiple Aspect Signaling: when the interlocked
gates are situated between Distant and Home Signal:

(i) The Gate Stop Signal shall be located, at not less than 180 meters in
rear of the gate.

(ii) In Single Distant territory, the Distant Signal (which shall function as
Gate Distant as well) shall be located, at not less than one kilometer in
rear of the Gate Signal.

(iii) In Double distant territory, Gate Distant signal shall be located, at not
less than 2 kilometers in rear of the Gate signal and Gate Inner Distant
Signal shall be located, at not less than one kilometer in rear of the
Gate Signal.

14.1.9 LC Gates in Automatic Block Signalling/Suburban Sections

(a) Operation & Audible Warning

(i) Level Crossing gates in automatic sections shall be worked by lifting
barrier gates operated mechanically or electrically and shall be
interlocked with signals.

(ii) They shall also be provided with audible warning on both sides of the
road, actuated by approaching trains. In addition, road user signal shall
be provided on both sides of the road, which shall exhibit ‘stop’ aspect,
if there is any train on the approach or whenever the gate is in closed
condition and it shall display ‘Caution’ aspect when gate is in open
condition.

(iii) The audible and visual train approach annunciation shall be such that
the Gateman gets adequate warning time, which shall be a minimum of
60 seconds for the train with maximum permissible speed, for closing
the level crossing gates before the train approaches within the sighting
distance of the relevant gate signals.

Chapter 14: LC Gates Page 303 of 535