Hong Kong Regulations

ROAD TRAFFIC (TRAFFIC CONTROL) REGULATIONS - SCHEDULE 5

LIGHTING, SIGNING AND GUARDING OF ROAD WORKS

[regulation 20]

1. The location of signs, road markings, barriers and road hazard warning
lanterns at road  works shall be in accordance with that set down in the Code
of Practice.

2. A lantern showing either a steady or an intermittent light may be used to
indicate to traffic the limits of a temporary obstruction of a road and,
without prejudice to paragraph 4, shall be of the size, colour and type
prescribed by paragraph 3.

3. (1) The colour of the light shown by a lantern referred to in paragraph 2
whether steady or intermittent, shall be amber and the external surfaces of
the body of the lantern shall be coloured yellow.

(2) Lanterns may be so constructed that light is emitted from 1, 2 or 3 sides
or from every horizontal direction but each lens or light enclosure of the
lantern shall be-

   (a)  if the light so shown is emitted from the lantern in only 1, 2 or 3
        horizontal directions, of such shape and size that the perimeter of
        its horizontally projected area on to any vertical plane shall be
        capable of lying wholly inside a circle having a diameter of 190 mm
        and wholly outside a circle having a diameter of 100 mm; and

   (b)  if the light so shown is emitted from the lamp in every horizontal
        direction, of such shape and size that the perimeter of its
        horizontally projected area on to any vertical plane shall be capable
        of lying wholly within a square having sides of 125 mm and wholly
        outside a square having sides of 40 mm in length.

(3) Each lantern shall be illuminated separately and by a single source of
light.

(4) Each lantern shall have a light transmitting cover or lens protecting the
source of the light.

(5) The height of the centre of any lens or light transmitting cover of a
lantern from the surface of the road in its immediate vicinity shall not
exceed 1.2 m.

(6) Each lantern shall have in association with the lens or light transmitting
cover a device having an area of not less than 50 cm2 fitted with amber
reflectors or amber reflecting material and positioned on the lantern so that
the device faces oncoming vehicles.

(7) Where a lantern is used which shows a steady light, then the luminous
intensity of the light shall not be less than 1 candela measured within 5
degrees above and below and 10 degrees left and right of the principal axis if
the light so shown is emitted from the lantern in only 1, 2 or 3 directions,
and measured within 5 degrees above and below the horizontal plane around the
vertical axis of symmetry if the said light is emitted in every direction.

(8) Where a lantern which shows an intermittent light is used then that
lantern shall be of such size and type that the rate of flashing shall be not
less than 90 flashes per minute and not more than 150 flashes per minute and
the peak luminous intensity measured in accordance with subparagraph (7) shall
be not less than 1.5 candelas.

(9) Lanterns used for the purposes indicated in this Schedule shall be of
robust design and shall be capable of complying with the performance standards
set down in the Code of Practice.

(10) All electrically operated lanterns and any associated connections, parts
or means of operation shall comply with the standards set down in the Code of
Practice.

(11) Any cable supplying power to the lanterns shall not carry a voltage
greater than 50 volts in the vicinity where the general public reasonably have
access.

(12) Radio interference from any current interrupting device shall be
suppressed in accordance with the specifications referred to in the Code of
Practice.

(13) All kerosene burning lanterns shall be of such type and shape as to
comply with the standards of construction set down in the Code of Practice.

4. In this Schedule "Code of Practice" (工作守則) means the Code of
Practice for the Lighting, Signing and Guarding of Road Works prescribed by
the Director under the Ordinance. 4. In this Schedule "Code of Practice"
(工作守則) means the Code of Practice for the Lighting, Signing and
Guarding of Road Works prescribed by the Director under the Ordinance.