A review of the literature on the effects of low doses of alcohol on driving-related skills.

Moskowitz, H. & Fiorentino, D.

A review of the scientific literature regarding the effects of alcohol on driving-related skills was conducted. The review covered 112 articles dated from 1981 to 1997. Results were indexed by blood alcohol concentration (BAC) and behavioural area and entered into a database. Two separate analyses were conducted. The first analysis determined the lowest BAC at which impairment is reliably present in driving-related skills. The second analysis determined the thresholds of impairment for each of 12 separate behavioural areas. It was concluded that: (A) Alcohol impairs some driving skills beginning with any significant departure from zero BAC. By BACs of 0.05 g/dl, the majority of the experimental studies examined reported significant impairment. By 0.08 g/dl, more than 94% of the reviewed studies showed impairment in the skills they measured. (B) Specific performance skills are differentially affected by alcohol. Some skills are significantly impaired by BACs of 0.01 g/dl, while others do not show impairment until BACs of 0.06 g/dl. (C) Discrepancies among the reported BAC thresholds of impairment within a behavioural area reflected a lack of standardisation of testing methods, instruments, and measures in the studies reviewed. (D) All drivers can be expected to experience impairment in some driving-related skills by 0.08 g/dl or less. (A)

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20020532 ST [electronic version only] /83 /

Washington, D.C., U.S. Department of Transportation DOT, National Highway Traffic Safety Administration NHTSA, 2000, III + 56 p., 113 ref.; DOT HS 809 028

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