6.—(1) The Agency shall, during and for the purposes of the execution or maintenance of the authorised works, temporarily close Warrengate Road and Hawkshead Lane and may at any time and for such period as it considers reasonably necessary to do so—
(a)divert the traffic from the above roads; and
(b)subject to paragraph (2), prevent all persons from passing along the above roads.
(2) The Agency shall provide at all times reasonable access for pedestrians going to or from premises abutting Warrengate Road and Hawkshead Lane insofar as they are affected by the exercise of the powers conferred by this article if there would otherwise be no such access.
(3) The Agency shall not exercise the powers of this article without first obtaining the consent of the highway authority, such consent not to be unreasonably withheld.