Northern Territory Consolidated Regulations Northern Territory Consolidated Regulations(1) A road train or long vehicle warning sign must be manufactured in 1 or 2 parts from sheet steel 0.8 millimetres thick or another material of at least the same stiffness, unless it is designed to be fixed to a vehicle using an adhesive.
(2) The warning sign must be at least 1.02 metres wide and at least 250 millimetres high.
(3) A road train warning sign must display the words ‘road train', and a long vehicle warning sign must display the words ‘long vehicle', in black capital letters at least 180 millimetres high in typeface Series B(N) that complies with Australian Standard AS 1744 Forms of Letters and Numerals for Road Signs .
(4) If the warning sign is in 2 parts, one word of the expression ‘road train' or ‘long vehicle' must be on one part and the other word of the expression must be on the other part.
(5) The warning sign must display the sign manufacturer's name or logo, and the brand and class of retro-reflective material used, in block letters not over 10 millimetres high.
(6) The warning sign must have a black border.
(7) The warning sign must be coated with yellow retro-reflective material of class 1 or 2 that meets Australian Standard AS 1906 Retro-reflective Materials and Devices for Road Traffic Control Purposes .
(8) The warning sign must be fitted so:
(a) no part of the sign is:
(i) over 1.8 metres above ground level; or
(ii) under 500 millimetres above ground level; and
(b) if the sign is in 2 parts – the parts are fitted at the same height above ground level.
Positioning of a warning sign