Carriageway markings consisting of studs and shown in any of the diagrams Nos. RM3, RM10 and RM11 shall not project above the adjacent surface of the carriageway more than ⅝ of an inch at their highest points nor more than ¼ of an inch at their edges, except that where reflectors are incorporated in studs of the carriageway marking shown in diagram No. RM3, such studs may at their highest points project above the adjacent surface of the carriageway not more than 1 inch.
Carriageway markings other than those referred to in the last preceding paragraph of this Regulation shall not project above the adjacent surface of the carriageway more than 1 of an inch.
Studs incorporating reflectors fitted to any of the carriageway markings shown in any of the diagrams Nos . RM2, RM4, RM5 and RM6 may project above the adjacent surface of the carriageway not more than ¼ inch at their highest points.
Section V
Miscellaneous Traffic Signs
23.—(1) Notwithstanding the provisions of Regulation 8 of these Regulations and subject to the succeeding paragraphs of this Regulation, signs placed temporarily on or near a road
(a) for conveying to traffic information as respects deviations of traffic routes or a warning of works being executed on or near a road or of any obstruction on a road;
(b) for conveying to vehicular traffic any prohibition, restriction or require ment of a description required for any purpose for which a sign may be placed under section 36 of the Road Traffic Act, 1956 (which relates to experimental traffic schemes in London), section 37 of that Act (which relates to the erection of traffic signs relating to special traffic regulations) or section 38 of that Act (which relates to signs for dealing with traffic congestion and danger); or
(c) pending the erection of any permanent sign prescribed by these Regulations, for conveying to traffic the indication which such a permanent sign indicates;
may be of such size, colour and type as is specified in the following provisions of this Regulation.
(2) Every such sign placed as aforesaid (hereinafter referred to as a "temporary sign") shall be of a shape which—
(a) is rectangular,
(b) is rectangular, but with the corners rounded; or
(c) is rectangular, but with one end pointed.
(3) Every temporary sign shall be of such size as is necessary to accommodate the wording, numerals and arrows appropriate to the purpose for which it is placed as aforesaid and any arms, badge, device, words or letters incorporated in the sign in accordance with the provisions of paragraph (6) of this Regulation.
(4) Every letter and numeral incorporated in a temporary sign other than any letter incorporated in the sign in accordance with the provisions of paragraph (6) of this Regulation shall be not less than 1½ inches nor more than 6 inches in height, and every arrow so incorporated shall be not less than 10 inches nor more than 20 inches in length except that where an arrow is incorporated in the index part of a sign with a pointed end such arrow shall be not less than 4 inches nor more than 8 inches in length.
