Lighting of road humps
4. Subject to regulation 6, no road hump shall be constructed in any road unless in the road there is lighting for that road hump which is—
(a)a system of street lighting furnished by at least three lamps lit by electricity and placed so that not more than 38 metres separate any of the lamps from the next one to it; or
(b)a system of street lighting complying with the British Standard for Road Lighting published by the British Standards Institution under number BS 5489 or with an equivalent standard or code of practice published by a national standards body or equivalent body of any member state of the European Community before the coming into operation of these Regulations; or
(c)a street lamp within 5 metres of the hump; or
(d)lighting specially provided for the road hump.