HC Deb 28 January 1960 vol 616 c68W
Sir L. Ropner

asked the Minister of Transport to what extent coloured cats' eyes have been tested as a means of warning the drivers of motor vehicles of the proximity of a crossing; and if he will make a statement.

Mr. Marples

Tests are going on. So far they have shown that coloured studs have a much reduced power of reflection. But there may be a limited use for red cats' eyes on the nearside edge of carriageways. At present we rely on a closer spacing of cats' eyes to give warning of the approach to a hazard.