29.—(1) A device constructed of rubber or flexible plastic material and being of the conical shape shown in diagram 577 for conveying the warning that drivers or vehicles should follow a certain route around an obstruction or road works in a road may be placed temporarily on the carriageway thereof subject to the following conditions:—
(a) the height or the device shall be not more than one metre nor less than 450 millimetres;
(b) the device shall be coloured as follows:—
(i)the uppermost part of the device to a depth of not less than one quarter nor more than one third of the height thereof shall be coloured red;
(ii)the base indicated in the said diagram may be of any colour;
(iii)the lowermost part of the device (except the said base) to a height of 50 millimetres shall be coloured red; and
(iv)the remaining part of the device shall be coloured white; and
(c) that part of the device coloured white shall be illuminated with white reflecting material and that part or the device coloured red may be illuminated with red reflecting material.
(2) A device constructed of rubber or flexible plastic material and being of the cylindrical shape shown in diagram 578 for indicating to drivers of vehicles a temporary division or the carriageway made so as to separate traffic moving in one direction from traffic moving in the opposite direction or for so indicating a part of a dual-carriageway road where vehicles other than those used for fire brigade, ambulance or police purposes, are prohibited from proceeding from one carriageway to the other may be placed temporarily on the carriageway of the road subject to the following conditions:—
(a) the height or the device shall be not more than one metre nor less than 450 millimetres,
(b) it shall have a diameter of not more than 125 nor less than 75 millimetres; and
(c) the device shall be coloured in the same way as the device prescribed in paragraph (1) and the provisions of sub-paragraphs (b) and (c) thereof shall apply accordingly except that for the reference to diagram 577 in the said sub-paragraph (b)(ii) there shall be substituted a reference therein to diagram 578;
30. A lamp in the form of an illuminated spherical globe for conveying the warning that drivers of vehicles are approaching a street refuge may be used subject to the following conditions:—
(a) the globe shall be white;
(b) the globe shall have a diameter of not less than 290 nor more than 310 millimetres, and
(c) the height or the centre of the globe from the surface or the carriageway in the immediate vicinity shall be not less than 3 nor more than 5 metres.
