# The Highways (Traffic Calming) Regulations 1993, Regulation 6: Restriction on the construction of rumble devices


Where a rumble device is constructed or maintained in a highway—
(a) no vertical face of any material forming that device shall exceed 6 millimetres measured vertically from top to bottom of that face;
(b) no part of the device shall be more than 15 millimetres above the surface of the carriageway

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Source: https://www.legislation.gov.uk/uksi/1993/1849/regulation/6 (the official version)
Page: https://openlegislation.uk/highways-traffic-calming-regulations-1993/regulation-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.