§ Mr. Onslow
asked the Secretary of State for Transport what is his forecast of the increase in traffic on the Chertsey-Wisley section of the M25 when the whole of the southern part of the motorway is in use, as compared with present figures; and what estimate he has made of the resulting increase in noise disturbance.
§ Mrs. Chalker
We expect the present traffic levels of about 25,000 vehicles per average 16-hour day to increase to 55,000 to 75,000 by 1987, when the whole of M25 is in use. Our noise predictions—on which the type and extent of mitigating works were planned — fully reflected the highest traffic increases predicted over the next 15 years.