# The Traffic Signs Regulations and General Directions 2016, Paragraph 27: Mirror at traffic signals warning of the presence of cyclists and electric scooters being used in a trial

Extent: E+W+S

(1) A sign to convey the description of warning in sub-paragraph (2) must consist of a circular convex mirror of a diameter not less than 300 mm and not more than 500 mm.
(2) The warning to which sub-paragraph (1) refers is of the presence at traffic signals of cyclists or drivers of electric scooters being used in a trial who may not otherwise be visible to other traffic.

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Source: https://www.legislation.gov.uk/uksi/2016/362/schedule/14/part/1/paragraph/27 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-2016/schedule-14/part-1/paragraph-27
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.