Any fatality occurring in a crash involving at least one driver, or motorcycle operator, with a BAC of .08 or higher is considered to be an alcohol-impaired driving fatality; drunk driving and alcohol-impaired can be used interchangeably.  The term drunk driving does not indicate that a crash or a fatality was the result of alcohol impairment. In producing national and state drunk driving statistics, the National Highway Traffic Safety Administration (NHTSA) estimates the extent of alcohol involvement when alcohol test results are unknown. Drivers in all 50 states and D.C. are considered to be alcohol-impaired if their blood alcohol concentration (BAC) is .08 grams per deciliter (g/dL) or higher.

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