# The Traffic Signs (Temporary Obstructions) Regulations 1997, Paragraph 4


The background shall be coloured yellow which shall be fluorescent and may also be reflectorised.

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Source: https://www.legislation.gov.uk/uksi/1997/3053/schedule/1/paragraph/4 (the official version)
Page: https://openlegislation.uk/traffic-signs-temporary-obstructions-regulations-1997/schedule-1/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.