Page:The Traffic Signs Regulations and General Directions 1975 (UKSI 1975-1536).pdf/26

 In this paragraph, the substitution authorised in sub-paragraph (a) thereof in the method shown in the said diagram 3011 shall be treated as having been effected by means of the upper arrow shown in that diagram, the lower arrows shown therein being treated as affixed in accordance with sub-paragraph (b) thereof.

(2) When a lens is, or lenses are, so affixed as provided in paragraph (1)(b) and any one lens so affixed is of the larger of the two sizes specified in diagram 3001 in the said Schedule, the distance between the centre of that lens and the centre of any other lens affixed next in position immediately above, below or to the side of that first mentioned lens shall be not less than 415 nor more than 440 millimetres.

(3) The direction in which the arrow shown in diagram 3003 in the said Schedule points may be varied so as to be—

(a) a direction which lies straight upright, or

(b) a direction which lies at any angle between 90 degrees either to the left or to the right of the said upright direction.

(4) The direction in which any arrow shown in any of the diagrams 3002, 3004 to 3006, 3009 and 3010 in the said Schedule points may be varied so as to be—

(a) a direction which lies straight upright, or

(b) a direction which lies between the direction shown in the diagram showing that arrow and the said upright direction.

(5) The direction in which the upper arrow shown in diagram 3007 of the said Schedule points may be varied so as to be a direction which lies at any angle from the upright position shown to an angle of 45 degrees to the left and the direction in which the upper arrow shown in diagram 3008 in that Schedule points may be so varied as aforesaid to an angle of 45 degrees to the right.

(6) The direction in which the lower arrow shown in each of the said diagrams 3007 and 3008 points may be varied so as to be a direction which lies at any angle from the position shown in each such diagram respectively to an angle of 45 degrees towards the upright position as shown for the upper arrow in each such diagram.

(7) When both arrows shown in diagram 3011 of the said Schedule are illuminated and extinguished simultaneously the direction in which the upper arrow shown in that diagram points may be varied so as to be a direction which lies at any angle from the position so shown for that arrow to an angle of 45 degrees to the right passing through an arc of 135 degrees and the direction in which the lower arrow so shown points may be varied so as to be a direction which lies at any angle from the position so shown for that arrow to an angle of 45 degrees towards the upright position or alternatively so as to be a direction lying at any angle from a position in which that arrow faces in the opposite direction from that so shown to an angle 45 degrees towards the upright position.

(8) When both arrows shown in the said diagram 3011 are illuminated and extinguished independently of each other, the direction of each such arrow may be varied so as to be a direction which lies at any angle between 90 degrees either to the left or to the right of the upright position.

Portable light signals for control of vehicular traffic

33.—(1) Portable light signals may be used for the control of vehicular traffic

(a) where, owing to roadworks being in progress or for some other reason, the width of the carriageway is temporarily restricted so that it will carry only one line of traffic,