The number of drunk drivers on the road increases from 6 PM peaks at 2 AM and then decreases by 6 AM The average number of weekend drivers who have consumed at least one drink and reach as high as 20- 25% between midnight and 3 AM and about 8% of drivers on the road between 1 and 3 AM are drunk. Increased drinking during the evening, night and early morning results in a large increase in drunk drivers on the road at night.
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Drivers that have consumed alcohol are on the road most often during late night/early morning
The average daily prevalence of drunk drivers on the road between 1am and 3am is close to 8% of drivers. Relative risk of an accident for alcohol-impaired drivers varies with the level of intoxication, and as the prevalence of impaired drivers increases, so too do the number of traffic fatalities. (Constructed from data in Levitt, S.D. and Porter, J. et al. J Political Economy, 109: 1198 - 1237, 2001 and Stein, S.K. et al. Alc, Drugs, and Driving, 5: 215 – 227, 1989) ©2008 NBEP
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