The undertaker must, if reasonably so required by the relevant highway authority, provide and maintain to the reasonable satisfaction of the relevant highway authority, during such time as the undertaker may occupy any part of a highway for the purpose of the construction of any part of the works authorised by this Order, temporary bridges and temporary ramps for vehicular or pedestrian traffic over any part of the works or in such other position as may be necessary to prevent undue interference with the flow of traffic in the highway.