A notice issued under subsection (3) of section 14 shall describe the alternative route or routes available for traffic, and shall be kept posted in accordance with the provisions of paragraph 2 above.

Where such a notice has been posted, F1the traffic authority may, before the expiry of the period for which the notice can continue in force, proceed to make an order under subsection (1) of section 14 with respect to the same road or part of a road without causing notice of their intention to make the order to be published in any newspaper.