9.—(1) Subject to paragraph (2), the undertaker may, for the purposes of constructing and maintaining the authorised development, alter the layout of any street within Works No. 5 and the layout of any street at its junction with such a street; and, without limitation on the scope of this paragraph, the undertaker may—
(a)increase the width of the carriageway of the street by reducing the width of any kerb, footpath, footway, cycle track or verge within the street;
(b)alter the level or increase the width of such kerb, footpath, footway, cycle track or verge;
(c)reduce the width of the carriageway of the street; and
(d)make and maintain crossovers, and passing places.
(2) The powers conferred by paragraph (1) must not be exercised without the consent of the local highway authority but such consent must not be unreasonably withheld and if the highway authority which has received an application for consent to exercise powers under paragraph (1) accompanied by all relevant information fails to notify the undertaker of its decision before the end of the period of 42 days beginning with the date on which the application is submitted with all relevant information, it is deemed to have granted consent.