D4-1-1: Uni-Directional Hazard Marker Sign - Sizes from 1600 x 400 - manufactured to Australian Standard AS 1742 & AS 1743.
The Unidirectional Hazard markers (D4-1-1, D4-1-2) are used at road
hazards where It is necessary to emphasise to approaching traffic the
direction to be taken if the marker appears in the driver's line of
approach. The direction is indicated by chevrons, which may point to the
left or right as required.
Typical uses of this marker are -
(i) to indicate en abrupt narrowing of the pavement;
(ii) to delineate an exposed median end or other carriageway obstruction
where all traffic must pass to one side; or
(iii) to indicate vehicle paths at intersections.
The Unidirectional Hazard marker should not be used:
(A) In lieu of Width markers erected to delineate both sides of the
carriageway as specified in Item (0).
(B) In lieu of the Chevron Alignment marker used to delineate
sub-standard curves as specified in Clause 3.4.9.
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