# The Traffic Signs Regulations and General Directions 2002, Regulation 35


(1) The road marking shown in diagram 1043 or 1044 shall not be placed at a gyratory system or roundabout.
(2) The road marking shown in diagram 1044.1 may be placed—
(a) only on an area of carriageway at a gyratory system or roundabout; and
(b) only if the entry of traffic into that area of carriageway is at all times controlled by traffic light signals.
(3) The road marking shown in diagram 1044.2 may be placed only on an area of carriageway which is not greater than 4.5 metres wide at its narrowest point.

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Source: https://www.legislation.gov.uk/uksi/2002/3113/part/II/regulation/35 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-2002/part-II/regulation-35
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.