Abstract： AS 1742.1:2021 pdf download.Manual of uniform traffic control devices Part 1: General introduction and index of signs. 2.2 Sign function Regulatory signs inform road users of traffic laws or regulations which it would be an offence to disre...

AS 1742.1:2021 pdf download.Manual of uniform traffic control devices Part 1: General introduction and index of signs.

2.2 Sign function

Regulatory signs inform road users of traffic laws or regulations which it would be an offence to disregard. They are normally

placed at the point or beginning of section where the regulation applies.

Included in this classification are signs which indicate the end of a legal restriction imposed by a preceding regulatory sign,

e.g. the END TRUCK AND BUS LOW GEAR AREA sign (R6.23).

2.3 Shape, colour and message

Most regulatory signs are rectangular with the long axis vertical and have black legend with or without red annulus and slash on

white background. For those signs having a special need for easy identification, other shapes and colours are specified. The

individual signs are illustrated in Clause 2.4 in colours which approximate those specified in AS 1743.

Wherever practicable, use is made of symbols and arrows to —

(a) assist in identification;

(b) clarify the instruction; and

(c) increase legibility.

Additional legend may be required on certain signs to restrict their application to particular periods and classes of traffic or to indicate the beginning or end of a special traffic lane. Wherever possible, the supplementary signs R7-2 to R7-5 and R9 Series

should be used for this purpose. However, where a special inscription is needed, this should be shown in black below the main

instructions on an enlarged sign or on a special supplementary white sign of the same width as the regulatory sign.

Recommended：