PART 4Provisions applying to signs in Part 2
1. The legend or symbol shown on the matrix sign must be displayed by means of white or yellow light (except any part which is red).
2. The flashing amber lamps provided for at item 11 for display on a gantry, or over a traffic lane or hard shoulder, with a sign provided for at item 1, 2 , 4, 8, 9 or 10 must operate such that—
(a)each lamp shows an intermittent amber light at a rate of flashing of not less than 60 nor more than 90 flashes per minute; and
(b)one horizontal pair of lights is always shown when the other horizontal pair of lights is not shown.
3. The flashing amber lamps provided for at item 12 of the sign table in Part 2 for display on a post with a sign provided for at item 1, 3, 4, 5, 6, 8 or 9 must operate such that—
(a)each lamp shows an intermittent amber light at a rate of flashing of not less than 60 nor more than 90 flashes per minute;
(b)one horizontal pair of lights is always shown when the other horizontal pair of lights is not shown; and
(c)the distance between them accords with the overall size of the sign.
4. The sign may display four lamps of the size, colour and type shown—
(a)when placed beside the carriageway, in the diagram at item 12 of the sign table in Part 2;
(b)when mounted on a gantry or other structure over the carriageway, in the diagram at item 11 of that table.
5. In operation each lamp must show an intermittent amber light at a rate of flashing of not less than 60 nor more than 90 flashes per minute and in such a manner that one light is always shown when the other light is not shown.
6. The sign must—
(a)be accompanied by four red lamps which, in operation, show an 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 lights of one vertical pair are always shown when the lights of the other vertical pair are not shown; and
(b)have the red cross shown in the diagram at item 14 or 15 of the sign table in Part 2, or the white symbol shown in the diagram at item 16 of that table, illuminated by a steady light when the red lights are flashing.
7.—(1) Section 36 of the Road Traffic Act 1988 applies to the sign.
(2) The sign is specified for the purposes of column 5 of the entry in Schedule 2 to the Road Traffic Offenders Act 1988(1) relating to offences under section 36 of the 1988 Act.