D4-3 Width Marker L/R Signs Reflective on aluminium 225x450mm

D4-3: Width Marker L/R Sign - Sizes from 225 x 450 - manufactured to Australian Standard AS 1742 & AS 1743. Not for use in Queensland.

For use where the shoulder of the road narrows

Width markers should normally be erected in pairs, one either side of the formation at points where the formation narrows over structures such as culverts, bridge piers or end posts.
They should be used where the clearance from the normal pavement width to the vertical obstruction is -
(i) 600 mm, or less, for a pavement 7.4 m wide;
(ii)1 m, or less, for a pavement 6.2 m wide; or
(iii) 1.2 m, or less, for a pavement 5.6 m wide.
Width markers should generally be erected on the line of a vertical obstruction. Where there are wide kerbs or footways on the structure the markers should be erected so that they indicate the width of the pavement.
At short narrow structures e,g. grid crossings, a double sided width marker on each side of the roadway may be used in lieu of a pair of markers at each end of the obstruction. Each marker should be erected in line with the start of the obstruction on the left hand side of the pavement facing in the direction of traffic. Double sided hazard markers may be used in lieu of conventional markers at longer sections of restricted width to provide delineation of the restriction, particularly at night.
At railway level crossings Width markers are used in conjunction with the signs RAILWAY (G9-32) and
CROSSING (G9-33) (see Part 7 of the Manual).
Width markers may also be erected singly on utility poles, central bridge piers or other vertical obstructions which are so close to the carriageway as to be a hazard. Dimensional proportions of the markers may be varied to fit the particular obstruction.

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