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Facts - Books - News    U.S. Facts Of Law:

The BAC Legal Limit

The blood alcohol content is the amount of alcohol concentrated in the blood also known as the BAC.  It is measured in grams per deciliter.  Generally, a BAC of 0.08 g/dL or higher is over the legal limit for operating a motor vehicle (DUI).

In measuring if one is over the BAC legal limit there are many variables affecting the amount of alcohol in the blood.  These include body weight, body fat, gender, nutrition and time since the alcohol was consumed.  A single drink my put a 100 lb. individual over the limit or it may take five drinks for a person weighing well over 200 lb.

The actual blood alcohol content or concentration can be measured by taking a blood sample and testing it in a laboratory.  In the field, law enforcement officers usually rely on a device called a breathalyzer which estimates the BAC by measuring the alcohol in the breath.  While not exact, it is estimated that the blood alcohol concentration as measured by these devices is within 15% of the actual number but may vary widely from brand to brand.

To measure the amount of impairment in the field, law enforcement officers will also generally administer what is called a "roadside sobriety test" or "field sobriety test".  These tests may involve several smaller tests to determine impairment and may include counting backwards, walking a straight line toe to heel, touching your index finger to your nose with your eyes closed, standing on one leg, following a moving finger with your eyes or others.

While a BAC of 0.08 g/dL is the legal limit, one should not assume that driving with lesser amounts of alcohol in the blood is as safe as driving sober.  Tests have shown that drivers with a BAC of only 0.05 g/dL is at a four times greater risk of being in an accident.

As blood alcohol content approaches double the legal limit a person will generally have a severe loss of motor control, balance, speech, judgment, vision and may suffer from vomiting.  As the BAC approaches 0.25 g/dL one generally will suffer from anxiety, be unable to walk without help, become incoherent, feel little pain from injury and is at risk of death from asphyxiation.  When a BAC of 0.40 is approached one will generally be at risk of unconsciousness and possible coma.  The risk of death from asphyxiation is pronounced.  Even higher BAC levels usually result in death without medical intervention.


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Man Released From Jail After Allegedly Driving With BAC 4 Times The Legal Lim...
Chicago Tribune Man released from jail after allegedly driving with BAC 4 times the legal limit Chicago Tribune A Midlothian man accused of driving on Interstate 88 with a blood alcohol content nearly four times the legal limit was released from jail on his own recognizance following a Wednesday court appearance, records show. Prosecutors charged 31 year old

Carter County School Board Expected To Reduce Maximum BAC For Staff To .02 WJHL
WJHL Carter County school board expected to reduce maximum BAC for staff to .02 WJHL The Carter County Board of Education is expected to drastically change its drug and alcohol policy tonight, after our Community Watchdog investigation discovered employees can show up to school with up to a .08 blood alcohol level, which is the

Driver Charged In Fatal Crash Had BAC 3 Times Legal Limit, Records Say AZCen...
AZCentral.com Driver charged in fatal crash had BAC 3 times legal limit, records say AZCentral.com A woman facing a murder charge in a 2015 Phoenix traffic death had a blood alcohol content three times the legal limit, according to newly released court records. Michelle Ware, 46, was driving south on Seventh Avenue in Phoenix on Feb. 7, 2015, when

Drive Sober Of Get Pulled Over 2week Initiative Planned For Mentor NewsHeral...
News Herald.com Drive Sober of Get Pulled Over 2 week initiative planned for Mentor News Herald.com The drivers involved in 67 percent of those crashes had a BAC of .15 or higher nearly twice the legal limit of .08. Area public safety officials remain particularly vigilant as summer draws to a close and Labor Day weekend marks its end for many. As and more raquo

East Idaho Man Arrested For DUI, Had 4 Times Legal Limit Of Alcohol Idaho St...
Idaho State Journal East Idaho man arrested for DUI, had 4 times legal limit of alcohol Idaho State Journal A driver arrested on suspicion of DUI on Teton Pass told a deputy that he39d had a crash along the way but was so under the influence that he couldn39t remember much of the where and when of it. The Teton County sheriff39s deputy was driving on Highway 22

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