Under the Influence of Alcohol Law and Legal Definition

The term "under the influence of alcohol" is defined as a “condition in which alcohol has so far affected the nervous system, brain, or muscles of the driver as to hinder, to an appreciable degree, his ability to operate a motor vehicle in a manner that an ordinary prudent and cautious person, if in full possession of his faculties, using reasonable care, would operate or drive under like conditions.” Byrd v. Workman, 2009 U.S. Dist. LEXIS 94624 (N.D. Okla. Oct. 9, 2009)