(1)If planning permission is granted under Part III of this Act for constructing or improving, or the Secretary of State proposes to construct or improve, a highway (hereafter in this section referred to as " the main highway "), the Secretary of State may by order authorise the stopping up or diversion of any other highway which crosses or enters the route of the main highway or which is, or will be, otherwise affected by the construction or improvement of the main highway, if it appears to the Secretary of State expedient to do so—
(a)in the interests of the safety of users of the main highway; or
(b)to facilitate the movement of traffic on the main highway.
(2)Subsections (2) to (5) of section 209 of this Act shall apply to an order under this section as they apply to an order under that section.