AS 1742.1:2021 – Manual of uniform traffic control devices Part 1: General introduction and index of signs. Means of illumination
Examples of means of Illumination of signs are as follows:
(a) A light within or behind the sign face, illuminating the main message or symbol, or the sign background or both, through a translucent material.
(b) An attached or Independently mounted light source in front of the sign, designed to direct adequate illumination over itS entire face.
NOTE Stray light from such a source should not be allowed to become a glare source for traffic approaching from the opposite direction.
(c) Electronic presentation of legend and other sign elements (signs prohibiting turns and speed limit signs are permitted to have a black background under this option). Means of reflectorization
Ref lectorization is achieved by using retroreflective materials conforming with AS/NZS 1906.1 and rellectorizing all elements of a sign except black.
Except in a few limited cases in the AS 1742 series where a performance Class from AS/NZS 1906.1 is specified for a particular sign or class of signs, the user selects an appropriate performance Class according to the sign location, positioning and any environmental or other relevant factors.
Advice on the selection and use of rctrorellectlve sheeting is given in AS/NZS 1906.1.
1.7 SIgn size
As indicated in Clause 1.5.1(d) most of the signs are provided in a range of sizes designated AA (smallest) up to A, B, C. I) or E. Guidance in the selection of the size of sign for use in a particular location is given In the part of the Standard covering the use of the sign.
1,8 Nonstandard signs
Authorities responsible for the erection of signs are not encouraged to develop signs for their own particular use. However, there will be instances where there is no suitable standard sign. In such cases, the sign developed should conform to the design requirements specified in this document for the particular sign classification, and with the requirements of Clause 1.6.5 if use of symbols is proposed. If it Is considered that the sign could be required by other authorities, contact should be made wIth Standards Australia, which constantly reviews road signs to ensure that the needs of road and traffic authorities and local government are met, and to minimize the proliferation of signs with differing designs of legend or symbol Where an authority develops its own sign. It Is recommended that It identifies the jurisdiction by its relevant prefix before the sign number. For example, in Victoria, a typical sign number could be W3-V123”.
1.9 ResponsibilIty and authority for Installation on public roads
Road users are required by law to comply with many of the signs included in this document. Moreover, in the various States and Territories, responsibility for installing traffic control devices is vested in a number of government and local government authorities, and the installation of new devices or interference with existing ones without authority may be an offence. Attention is drawn to the fact that it may be necessary to obtain the approval of the appropriate authority before installing any traffic control device. Approvals are required in most States for the Installation or removal of certain regulatory signs and devices.
The placement of unauthorized traffic signs or devices on or adjacent to the road by a private or commercial organization without the authority of the controlling body causes distraction and lessens the effect of devices essential to the road user. The display of unofficial and non-essential devices should not be permitted.
1.10 Private roads
Certain private roads such as circulating roadways in large publicly accessed off-street car parks that are not administered by the road authority may be designated as roads on which relevant provisions In road traffic regulations are to apply. In such cases the approval for the use of signs and devices as set out in Clause 1.9 will also apply.