31.—(1) Where works to, on or near any road cause, or are likely to cause, danger to traffic,—
(a)the person who has entered into a contract or otherwise undertaken to carry out those works shall make available to the person present at and for the time being in charge of carrying out those works such signs or other devices as would, if properly placed, provide adequate warning to traffic of that danger;
(b)the person present at and for the time being in charge of carrying out those works shall—
(i)place and maintain those signs or devices, or cause those signs or devices to be placed and maintained in such manner as to give traffic sufficient warning of that danger; and
(ii)remove or cause to be removed those signs or devices as soon as the works have been completed.
(2) For the purposes of paragraph (1), signs or devices which comply with, and are placed in accordance with, such general or other directions as may be given by an authorised officer of the Department shall be deemed to provide adequate warning to traffic.
(3) The works referred to in paragraph (1) do not include street works within the meaning of the [1995 NI 19.] Street Works (Northern Ireland) Order 1995.
(4) Any person who without reasonable excuse fails to comply with any requirement of paragraph (1) is guilty of an offence.