HC Deb 13 December 1972 vol 848 c144W
Sir J. Gilmour

asked the Secretary of State for Scotland in view of the fact that the reflective concrete kerb on the second section of the M90 motorway no longer reflects, if he will immediately arrange for it to be treated so as to restore its reflective quality.

Mr. Gordon Campbell

The reflective quality of these kerbs depends on angled concrete facets at approximately right angles to vehicle headlights, and not on the incorporation of specially reflective material. I am advised that their effectiveness remains unimpaired.