On-the-Road Driving Behavior and Breath Alcohol Concentration
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1976-11-01
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Edition:Final report
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Abstract:Unobtrusive measures of nocturnal driving performance were obtained on public highways at 42 rural sites on Thursday, Friday, and Saturday nights from approximately 10:30 P.M. to 3:00 A.M. Special data acquisition and recording systems were developed to obtain analog records of speed and lateral position electronically. The roadside survey team was located approximately one mile downstream from the observation window. An analog record of speed was also obtained near the survey site as drivers were directed to a stop by a law enforcement officer. The survey team obtained measures of breath alcohol concentration (BAC) from 1,663 motorists, as well as interview data concerning biographical variables, drinking patterns, and driving record. BACs of .10 or higher were found in 4.6% of this 100% sample of the nocturnal weekend driving population. Interview results confirmed that young male motorists are an important population-at-risk, but older male and female liquor drinkers are also prevalent. A double standard exists regarding attitudes toward beer and liquor, especially among younger males. Driving performance measures indicated that drivers with .08-.149 BAC react with caution to unexpected situations, but are less able to smoothly come to a stop when directed to do so. Legal constraints which affected field activities are described and implications for roadside research are discussed. /Abstract from report summary page.
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