Canadian Rail Operating Rules (CROR) TC O-0-93 - PDF

(b) A flagman must go the required distance from the condition, and in each
direction when possible, to ensure that an approaching movement will have
sufficient time and distance to be able to stop before the condition. Unless
otherwise provided, a flagman must go at least two miles from the condition to
a location where there will be an unobstructed view of the flagman from an
approaching movement.
When a movement is observed approaching, the flagman must display a stop
signal using a red flag by day or a lighted red fusee by night or when day
signals cannot be plainly seen. The flagman must continue to display a stop
signal until the movement being flagged has:
(i) acknowledged the stop signal with engine whistle signal 14 (b) (two
short);
(ii) come to a stop; or
(iii) reached the location of the flagman.
(c) A movement stopped by a flagman must not proceed until so instructed by
the flagman.
(d) A flagman must be equipped with a red flag and eight red fusees. The
presence of an unbroken seal verifies that the flagging equipment kit is
properly supplied.
36. DECREASED FLAGGING DISTANCE
On a subdivision specified in special instructions where maximum speed for
movements is not greater than 30 MPH, in the application of Rule 35, 42 or 43
the distance of at least two miles is decreased to at least one mile.
PROTECTION OF IMPASSABLE OR SLOW TRACK
40. GENERAL
(a) Special instructions will specify when Rules 42, 43 and 849 are applicable on
non-main track.
(b) When designated by Time table footnotes or special instructions that TGBO
and/or DOB are applicable on a track that is non-main track, protection of
impassable or slow track may be provided as prescribed by Rules 42 and 43.
40.1 PROTECTION OF TRACK WORK ON NON-MAIN TRACK
When operating on non-main track;
(a) A movement approaching a red signal located between the rails of a track
must be stopped before passing it and must not proceed beyond such signal
until it has been removed. An employee of the same class who placed the red
signal and/or special lock may alone remove it, but only when authorized by
the foreman.
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