Speed limits are heavily researched controls meant to reduce road fatalities and accommodate for road conditions.

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More than half the road fatalities were caused by inebriated motorists, according to the Ministry.

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GM's research, a disproportionate share of accidents and road fatalities occur at night.

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True, years of safety engineering and seat-belt-law enforcement have reduced road fatalities from 1.73 deaths per 100 million miles traveled in 1994 to 1.47 in 2005, but automakers think they can do better.

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Large trucks were involved in accidents that accounted for almost 10% of road fatalities in the U.S. in 2009, and truck drivers are five times more likely to die in work-related accidents than the average US worker.

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Road fatalities are not uncommon.

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The force said its objectives for 2012-13 included delivering an effective emergency response, targeting organised crime groups and drug markets, working with partners and the public to catch offenders, reduce re-offending and road accident fatalities, and plan and prepare to respond to any major and serious incidents.

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She said the "rapid" increases in premiums had coincided with "significant improvements in road safety" and a reduction in fatalities and serious injuries on the road.

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According to the Federal Highway Administration, almost two-thirds of all highway fatalities are categorized as "road departures, " as opposed to intersection or pedestrian accidents, an indication of tired drivers veering out of their lanes or off the road altogether.

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Given that road travel is much more dangerous, this probably caused more fatalities than did the original crash.

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