12.—(1) The undertaker may, for the purposes of carrying out the authorised development, temporarily alter, divert, prohibit the use of or restrict the use of any street and may for any reasonable time—
(a)divert the traffic from the street; and
(b)subject to paragraph (3), prevent all persons from passing along the street.
(2) Subject to paragraph (1), the undertaker may use any street where the use has been prohibited or restricted under the powers conferred by this article and within the Order limits as a temporary working site.
(3) The undertaker must provide reasonable access for cyclists and pedestrians (including wheelchair users) going to or from premises abutting a street affected by the temporary alteration, diversion, prohibition or restriction of a street under this article if there would otherwise be no such access.
(4) Subject to paragraph (1), the undertaker may temporarily alter, divert, prohibit the use of or restrict the use of the streets specified in columns (1) and (2) of Schedule 5 (temporary prohibition or restriction of the use of streets) to the extent specified in column (3) of that Schedule.
(5) The undertaker must not temporarily alter, divert, prohibit the use of or restrict the use of—
(a)any street specified in paragraph (4) without first consulting the street authority; and
(b)any other street without the consent of the street authority which may attach reasonable conditions to any consent.
(6) If a street authority fails to notify the undertaker of its decision before the end of the period of eight weeks of receiving an application for consent under paragraph (5)(b) (or such longer period as may be agreed with the undertaker in writing), that street authority is deemed to have granted consent.