1964_ROAD_TRAFFIC_(TRAFFIC_CONTROL)_REGULATIONS — Page 144

G 144 CAP. 374] Road Traffic (Traffic Control) Regulations

[Subsidiary]

[1989 Ed.

(d) each lamp shall be separately illuminated and the effective diameter of the lens of the lamp shall be either-

(i) not less than 190 mm nor more than 220 mm; or (ii) not less than 275 mm nor more than 310 mm;

(e) the height of the centre of the green lens from the surface of the carriageway in its immediate vicinity shall be, where light signals are placed at the side of the carriageway, not less than 2.1 m nor more than 3.5 m and where light signals are placed over the carriageway not less than 5.3 m nor more than 9 m;

(f) the centre of adjacent lenses shall, when the effective diameter of each lens is not less than 190 mm nor more than 220 mm be not more than 360 mm apart and, when the effective diameter of each lens is not less than 275 mm nor more than 310 mm, be not more than 440 mm apart;

(g) the head of the signals enclosing the lamps shall be coloured black and any post supporting the head shall be coloured grey;

(h) where a backing board is used in conjunction with the light signals it shall be coloured black with a white border.

3. Light signals prescribed by this paragraph shall be used for the control of vehicular traffic at level crossings, at approaches to swing bridges, at ferry boat landings, at fire stations and ambulance stations and shall be of the following size, colour and type-

(a) 2 lights each showing an intermittent red light shall be used;

(b) the lamps shall be arranged horizontally so that there is a distance of not less than 500 mm nor more than 700 mm between the centres of the lenses of the lamps;

(c) each lamp shall be separately illuminated and the effective diameter of the lamp shall be either-

(i) not less than 190 mm nor more than 220 mm; or

(ii) not less than 275 mm nor more than 310 mm,

but the 2 lamps on the same signal head shall both have the effective diameter of not less than 190 mm nor more than 220 mm or both have such diameter of not less than 275 mm nor more than 310 mm;

(d) when the signal is operated each lamp shall show its intermittent red light at a rate of flashing of not less than 60 nor more than 90 flashes per minute and in such a manner that the light of one lamp is always shown when the light of the other lamp is not shown;

(e) the height of the centre of each lens from the surface of the carriageway in its immediate vicinity shall be in the case of signals placed at the side of the carriageway not less than 2.1 m nor more than 3.5 m and in the case of signals placed over the carriageway not less than 5.3 m nor more than 9 m;

(f) where a backing board is used in conjunction with the light signals it shall be coloured black with a white border;

(g) no lettering or characters shall be used on the lenses.

4. (1) Subject to the following subparagraphs, a lens which when illuminated shows a green arrow or an amber "T" characteristic-

(a) may be substituted for the lens showing the green light in the light signals referred to in paragraph 2 of this Schedule; or

(b) may be affixed to the light signal referred to in paragraph 2 of this Schedule.

(2) The direction of any green arrow may be varied to suit the particular circumstances providing-

(a) that no arrow points below the horizontal position;

(b) that no adjacent arrows point within 45 degrees of one another.

(3) The effective diameter of a lens showing either a green arrow or an amber "T" characteristic shall be either-

(a) not less than 190 mm nor more than 220 mm; or

(b) not less than 275 mm nor more than 310 mm.

5. (1) Portable light signals prescribed by regulation 21 shall comply with paragraphs 2 and 4 of this Schedule subject to the following-

(a) the height of the centre of the green lens shall be not less than 1.5 m nor more than 2.5 m from the surface of the carriageway;