An order made under this subsection as respects any road may prohibit, either generally or during periods specified in the order, the driving of motor vehicles on that road at a speed exceeding that specified in the order.

The power to make an order under subsection (1) is exercisable by the traffic authority, who shall before exercising it in any case give public notice of their intention to do so.

While an order under subsection (1) above is in force as respects a road, that road shall not be a restricted road for the purposes of section 81 of this Act.

This section does not apply to any part of a special road which is open for use as a special road.

Section 68(1)(c) of this Act shall apply to any order made under subsection (1) above.