If, on or after publishing a notice required by Part I or Part II of this Schedule to be published in connection with the making or confirmation of an order or scheme, it appears to the Minister or a F1other highway authority desirable to do so, he or they shall take such steps, in addition to those required by the said Part I or Part II to be taken, as will in his or their opinion secure that additional publicity is given in the area affected by the order or scheme to the proposals contained in it.