You will need to comply with this standard if you intend to operate a road train over 22m long. A road train is a line of linked trailers pulled by a truck. You must display a road train or long vehicle warning sign which meets the requirements set out in this standard.
This standard outlines the forms and dimensions of a range of letters and numerals to be used on standard road signs. The standard also outlines the spacings to be used in setting out the letters and numerals. This standard gives the forms and dimensions of a range of letters and numerals to be used on standard road signs.