Noise Prevention Sir Dudley Smith To ask the Secretary of State for Transport how much money was spent on noise prevention where the M40 motorway is concerned (a) before its original opening and (b) since its full implementation between Birmingham and London. Mr. Chope To date more than £2·7 million has been spent on specific noise mitigation measures on the M40 as a whole. It is not possible to give precise figures as noise amelioration measures are often an integral part of earthworks design and are not separately costed.