# The Traffic Signs Regulations and General Directions 2016, Paragraph 3

Extent: E+W+S

The road marking must not project above the surface of the adjacent carriageway by more than 6 mm except for the raised ribs which may project above the surface of the remainder of the marking by not more than the maximum dimension indicated on the lower part of the diagram illustrating the side elevation of the marking.

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Source: https://www.legislation.gov.uk/uksi/2016/362/schedule/11/part/6/paragraph/3 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-2016/schedule-11/part-6/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.