# The Traffic Signs Regulations and General Directions 2016, Paragraph 3

Extent: E+W+S

A delineator is to consist of a flat device—
(a) of which the side intended to be exposed to traffic is coloured as shown in the diagram at item 5 of the table in Part 6 and the reverse side is either so coloured or coloured only grey or only red;
(b) which conforms to the provisions of British Standard BS 8442:2015; and
(c) of which the base is of any single colour, except that a reflectorised white line 100 mm wide at an angle of not more than 60 degrees to the road surface may be marked on one side of the base at right angles to the face of the delineator.

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Source: https://www.legislation.gov.uk/uksi/2016/362/schedule/13/part/8/paragraph/3 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-2016/schedule-13/part-8/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.