HC Deb 31 July 1963 vol 682 cc420-1
15. Mr. Longden

asked the Minister of Transport what has been the effect on the accident rate of the imposition of speed limits of 40 and 50 miles per hour in built-up areas; and whether he will now make it compulsory for motorists in such areas to dip their headlights rather than rely only upon their side-lights.

Mr. Marples

From a sample survey in the London Traffic Area the Road Research Laboratory concluded that the imposition of a 40 m.p.h. speed limit on unrestricted roads reduced the number of personal injury accidents by 19 per cent. On roads previously subject to a 30 m.p.h. limit there was no significant change in the accident rate. No 50 m.p.h. speed limit has been imposed in built-up areas.

With regard to the second part of the Question, I am now studying a report which the Road Research Laboratory have recently completed on the dipped headlight experiment in Birmingham.

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