# The Traffic Signs Regulations and General Directions 2016, Paragraph 5

Extent: E+W+S

(1) The pyramid must consist of three visible sides, each of which is as specified in the diagram.
(2) It must be made of rubber or flexible plastic material.
(3) It must be constructed so that it can stand upright firmly on the surface of a road.
(4) The surface coloured red (marked A) may be reflectorised.
(5) The surface coloured white (marked B) must be reflectorised.
(6) Each outer edge of the triangular face must be the same length.
(7) The pyramid must not be illuminated through internal or external illumination.

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Source: https://www.legislation.gov.uk/uksi/2016/362/schedule/13/part/7/paragraph/5 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-2016/schedule-13/part-7/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.