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Casualties and accidents on motorways
Economic effects of the limit
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12 months 3-lane motorways 73 miles accidents and casualties bunching carriageway cars exceeding 70 casualty rate Class I roads cost of accidents deﬁnition dual-carriageway roads effect enquiries estimated exceeding 70 m.p.h. expected numbers fast main roads fatal and serious ﬁgures ﬁve ﬂow given in Table heavy goods vehicles increase limit of 70 limit on fast limit on motorways limit was introduced m.p.h. limit m.p.h. on motorways m.p.h. speed limit mean speed Mid-December 1965 mileage million vehicle-miles month periods beginning motorists motorway accidents motorway casualties National Opinion Polls number of accidents numbers of injury offside lane offside third operating costs Percentages periods beginning noon permanent 70 m.p.h. permanent speed limit reduction in speeds Road Research Laboratory Roads formerly unrestricted roads subject rural roads skidding speed limit trial speed measurements speeds of cars statistically signiﬁcant survey thing three-lane traffic traﬂic trial 70 Trunk and Class wanted a speed