Proceedings required to be taken for the purposes of an order under section 9 of this Act relating to a special road or for the purposes of an order under section 12 of this Act relating to a trunk road may be taken concurrently with proceedings required by this Schedule to be taken for the purposes of an order under section 5 of this Act or, as the case may be for the purposes of a scheme under section 7 of this Act, relating to that road.