37.—(1) The undertaker may whenever in its opinion it is necessary to do so whether in case of emergency or for the purpose of or in connection with the authorised activities close any of the bridge roads whether wholly or partially.
(2) Where the undertaker proposes to close any of the bridge roads it shall except in an emergency—
(a)give not less than 7 days’ notice by advertisement in at least one local newspaper circulating in the area; and
(b)throughout the period of such closure display signs at convenient situations on the roads communicating with any public access road to the new crossing giving warning of the closure.