asked the Secretary of State for the Environment what are the number of miles of dual three-lane motorways completed during each of the past five years, and the number of miles to be completed during each of the next five years.

The figures for the mileage of trunk road motorways in England completed are as follows:

	1967	1968	1969	1970	1971	Total
Miles	75	32	41	97	210	455

The majority of this mileage is dual three-lane and forms part of a total of 652 miles of this standard in use at 31st December, 1971.Present plans envisage the completion of a further 500 miles of dual three-lane motorways in the five years 1972–76 inclusive. The phasing of this programme of motorway construction will depend on the satisfactory preparation of detailed plans and the duration of the necessary statutory procedures.