HC Deb 15 November 1967 vol 754 c111W
Mr. J. H. Osborn

asked the Minister of Transport if she will introduce legislation to ensure that fast police cars, as well as private cars, have accurate speedometers, and to lay down testing procedures to ensure accuracy of readings at 70 miles per hour and above.

Mr. Carmichael

All cars are already required by regulation to have a speedometer with an accuracy of plus or minus 10 per cent. at speeds above 10 m.p.h. We have no evidence that speedometers in general use are incapable of maintaining an accuracy of this order and do not see justification for laying down testing procedures. The police do, of course, regularly check the accuracy of their speedometers.