13(1)This paragraph applies in relation to a work authorised by this Act which appears to the Secretary of State to constitute—U.K.
(a)the construction of an extension to a trunk road or special road, or
(b)the realignment of a trunk road or special road.
(2)The Secretary of State may by order made by statutory instrument provide that the highway comprising the extension or realignment is to become a trunk road or special road (or both) as from a date—
(a)specified in the order, or
(b)if the order so provides, specified in an instrument in writing after the making of the order.
(3)Where, under an order under this paragraph, a highway becomes a special road—
(a)the order must specify the special road authority for the highway,
(b)the highway is to be regarded as provided by the specified special road authority under a scheme under section 16 of the Highways Act 1980 made on the day the order is made, and
(c)the highway is to be regarded as so provided for the use of traffic of such classes referred to in Schedule 4 to that Act as may be provided for in the order (and the order may make different provision for different parts of the highway).
(4)Provision under sub-paragraph (3)(c) may be expressed by reference to classes of traffic which are at any time authorised under a scheme under section 16 of the Highways Act 1980 in relation to the road of which the highway is a realignment or extension.