same side of the road a road marking shown in diagram 1019, 1020 or 1021, except that this paragraph shall not apply where any such plate is so placed for the purposes of a temporary statutory provision.
15. The sign shown in diagram 545 when used in combination with the plate shown in diagram 547.1 or with the sign (amber flashing lights) prescribed by Regulation 37(2) of the Regulations may be placed only on a road on which a school crossing patrol is from time to time on duty in the vicinity of the site of the sign.
16. The traffic sign shown in diagram 574 may be placed on a site on or near a road only where that site lies either in a place or area which is an infected place or area or part thereof for the purposes of the Diseases of Animals Act 1950[1] or outside but near the boundaries of such a place or area and shall not be retained there after that place or area or part thereof ceases to be or to be in such an infected place or area or part thereof.
17. The signs shown in diagrams 564 to 569.1 and 754 to 756 may be placed on or near a road only in connection with the execution of works thereon or a temporary obstruction thereon and any such sign so placed and any other sign shown in a diagram in Schedule 1 to the Regulations placed on or near a road in either connection as aforesaid shall not be retained on or near the road after the completion of the works or the removal of the obstruction, as the case may be, unless it is a sign of the type shown in diagram 565.1 and if so, that sign may be retained on or near a road after the completion of the works for so long as the highway authority concerned sees fit.
18.—(1) Signs shown in diagrams 603 and 604 may be used only where one- way working is necessary owing to a temporary closure to vehicular traffic of a width of the carriageway of a road.
(2) The signs shown in diagrams 615 and 811 shall not be used unless used in conjunction with one another and shall not be used at all in conjunction with the signs shown in diagrams 603 or 604.
19. The sign shown in diagram 569.2 may be placed on or near a road only in connection with works involving an alteration in the layout of the carriageway or involving the removal of or change in the road markings or other traffic signs placed on or near a road at cross roads or other junctions and shall be retained for not more than 3 months from the date of the completion of those works.
20. Signs shown in diagrams 830, 830.1, 831 and 832 (except when varied to contain the words "weight checks") may be used only—
(a) in connection with a traffic census the taking of which on a road has been approved by the highway authority for that road, by the chief officer of police of the police area in which the road is situate, and by or on behalf of the Secretary of State, and
(b) in the vicinity of the traffic census points appointed by or on behalf of the Secretary of State.
21. The signs shown in diagrams 833 to 836 may be used only to regulate the movement of vehicular traffic into and out of premises with more than one access to a road.
22. The sign shown in diagram 536 shall be mounted on two posts and so much of each posti as extends above ground level shall be coloured black and white in alternate horizontal bands, each band being not less than 250 nor more than 335 millimetres in depth.
- ↑ 1950 c. 36.
