# The Traffic Signs Regulations and General Directions 2016, Paragraph 28

Extent: E+W+S

When placed on a motorway the sign must be varied so that—
(a) the background colour is blue;
(b) the border, any legend and any symbol (other than a red bar) is white; and
(c) any red bar has a white edge.

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Source: https://www.legislation.gov.uk/uksi/2016/362/schedule/11/paragraph/28 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-2016/schedule-11/paragraph-28
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.