(i) place a red flag at each
location stated in the GBO to
the right of the track as seen
from an approaching move-
ment; and
(ii) place a yellow-over-red
flag at least two miles out-
side the track limits defined
by the red flags, to the right
of the track as seen from an
approaching movement.
(iii) Track work must not be
undertaken until the pre-
scribed signals are in place in
all directions.
(iv) Rule 842 flags must not
be in place more than 30 min-
utes prior to or after the times
stated in the GBO unless pro-
vided for in the GBO.
(v) Rule 842 limits must not
be overlapped.
(b) When a specific track is to be used, instructions from the fore-
man must specify the track upon which the instructions apply.
In CTC, when Rule 842 protection is in effect on more than one
track or when signalled turnouts are within the limits there must be
a clear understanding in writing between the foreman and the RTC
as to what route(s) movements are to use. The foreman’s instruc-
tions to the movement must be identical to the routing arrange-
ment with the RTC. Should the foreman require operation on a
specific track when the arrangement with the RTC was for more
