§ Sir Sydney Chapman
To ask the Secretary of State for the Environment, Transport and the Regions what is the present average cost of constructing one mile of new motorway; and what are the figures in cash terms for(a) 1988, (b) 1978 and (c) 1968. 
§ Ms Glenda Jackson
The average cost of constructing one mile of new, dual three lane motorway is £17.1 million. The figures in cash terms for 1988, 1978, and 1968 are £11.8 million, £6.1 million and £1.7 million respectively.