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5639-0, 5640-8, 15120-9, 56478-1. Blood alcohol content (BAC), also called blood alcohol concentration or blood alcohol level, is a measurement of alcohol intoxication used for legal or medical purposes. [ 1 ] BAC is expressed as mass of alcohol per volume of blood.
For drivers 21 years or older, driving with a blood alcohol concentration(BAC) of 0.08% or higher is illegal. For drivers under 21 years old, the legal limit is lower, with state limits ranging from 0.00 to 0.02.[2] Lower BAC limits apply when operating boats, airplanes, or commercial vehicles.
Drinking enough alcohol to cause a blood alcohol concentration (BAC) of 0.03–0.12% typically causes a flushed, red appearance in the face and impaired judgment and fine muscle coordination. A BAC of 0.09% to 0.25% causes lethargy, sedation, balance problems, and blurred vision. A BAC from 0.18% to 0.30% causes profound confusion, impaired ...
A study drawing on international BAC levels concluded that reducing the U.S. BAC level to .05 would result in an 11 percent reduction in alcohol-related crashes. Utah became the first state to ...
0.05% for all other drivers. Driving with 0.15% BAC by mass and above (legally defined as Drunk Driving) is a distinct offence from having over 0.08% but under 0.15% BAC, and is subject to heavier penalties. Persistent offenders may be barred from driving for terms up to and including life, and may be imprisoned.
The decision combines three cases but centers on an incident in North Dakota, in which a man, after crashing his car, took a Breathalyzer which found his blood-alcohol concentration (BAC) at three ...
Under conditions of moderate alcohol consumption where blood alcohol levels average 0.06–0.08 percent and decrease 0.01–0.02 percent per hour, an alcohol clearance rate of 4–5 hours would coincide with disruptions in sleep maintenance in the second half of an 8-hour sleep episode.
Nationally, 12.8% of all drivers involved in fatal collisions during 2013 are known to have been intoxicated according to the blood alcohol concentration (BAC laws) of their state. [citation needed] This number is based on a systematic examination of the official records of each and every incident involving a fatality during that year in the US.