# The Traffic Signs Regulations and General Directions 2016, Paragraph 2

Extent: E+W+S

In respect of items 9 and 10, each lamp incorporated into the sign must show an intermittent amber light at a rate of flashing of not less than 60 nor more than 90 flashes per minute, and in such a manner that the lights of one horizontal pair are always shown when the lights of the other horizontal pair are not shown.

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Source: https://www.legislation.gov.uk/uksi/2016/362/schedule/13/part/5/paragraph/2 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-2016/schedule-13/part-5/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.