Jake Nelson, director of Traffic Safety Advocacy & Research for AAA, warns against driving when sleep deprived. “If you have not slept seven or more hours in a given 24-hour period, you really shouldn’t be behind the wheel of a car,” he says. Research suggests that drivers who sleep six hours or less in a day are twice as likely to crash as drivers who had seven hours of sleep or more. The crash rates seen with drivers with lack of sleep were similar to those of drunk drivers.

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