HC Deb 02 May 1991 vol 190 cc305-6W
Mr. McWilliam

To ask the Secretary of State for Transport if he will give an estimate of the increased length of repair-free life of a motorway built using modern drainage techniques as opposed to those constructed using traditional techniques.

Mr. Chope

There is no firm evidence to suggest that modern drainage systems are more effective than properly constructed traditional systems. The main objectives of incorporating modern drainage systems are to separate surface water and sub-surface drainage, improve value for money, reduce the demand for scarce aggregate resources and reduce stone scatter.

Mr. McWilliam

To ask the Secretary of State for Transport if he will investigate the reasons for the reluctance of building contractors to fit modern drainage systems in new road building programmes.

Mr. Chope

I am not aware of any reluctance on the part of contractors to fit modern drainage systems, but am willing to look at any examples which the hon. Member can provide.