<Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (August 2008) (Learn how and when to remove this template message) </Td> </Tr> <P> Alcohol - related traffic crashes are defined by the United States National Highway Traffic Safety Administration (NHTSA) as alcohol - related if either a driver or a non-motorist had a measurable or estimated BAC of 0.01 g / dl or above . </P> <P> This statistic includes any and all vehicular (including bicycle and motorcycle) accidents in which any alcohol has been consumed, or believed to have been consumed, by the driver, a passenger or a pedestrian associated with the accident . Thus, if a person who has consumed alcohol and has stopped for a red light is rear - ended by a completely sober but inattentive driver, the accident is listed as alcohol - related, although alcohol had nothing to do with causing the accident . Furthermore, if a sober motorist hits a drunk pedestrian, the accident is also listed as alcohol - related . Alcohol - related accidents are often mistakenly confused with alcohol - caused accidents . Some have criticized the NHTSA for compiling this statistic since it may give the impression that drunk drivers cause a much higher percentage of accidents and does not accurately reflect the problem of drunk driving in the United States . </P> <P> Nationally, 31% of all drivers involved in fatal accidents during 2013 are known to have been intoxicated according to the blood alcohol concentration (BAC laws) of their state . This number is based on a systematic examination of the official records of each and every accident involving a fatality during that year in the US . However, a majority of fatalities resulting from car accidents involving alcohol are from sober drivers who are hit by drunk drivers . </P>

About one in how many traffic fatalities in the united states are related to alcohol