BLOOD ALCOHOL TYPICAL PREDICTABLE EFFECTS CONCENTRATION (BAC)1 EFFECTS ON DRIVING ff Some loss of judgment ff Decline in visual functions ff Relaxation (rapid tracking of a moving ff Slight body warmth target) .02% ff Altered mood ff Decline in ability to perform two tasks at the same time (divided attention) ff Exaggerated behavior ff Reduced coordination ff May have loss of small-muscle ff Reduced ability to track moving control (e.g., focusing your eyes) objects .05% ff Impaired judgment ff Difficulty steering ff Usually good feeling ff Reduced response to ff Lowered alertness emergency driving situations ff Release of inhibition ff Muscle coordination becomes ff Concentration poor (e.g., balance, speech, ff Short-term memory loss vision, reaction time, and ff Speed control hearing) ff Reduced information .08% ff Harder to detect danger processing capability (e.g., ff Judgment, self-control, signal detection, visual search) reasoning, and memory are ff Impaired perception impaired ff Clear deterioration of reaction ff Reduced ability to maintain time and control lane position and brake .10% ff Slurred speech, poor appropriately coordination, and slowed thinking ff Far less muscle control than ff Substantial impairment in normal vehicle control, attention to ff Vomiting may occur (unless this driving task, and in necessary level is reached slowly or a visual and auditory information .15% ff person has developed a processing tolerance ff for alcohol) ff Major loss of balance 1 Information in this table shows the BAC level at which the effect usually is first observed, and has been gathered from a variety of sources including the National Highway Traffic Safety Administration, the National Institute on Alcohol Abuse and Alcoholism, the American Medical Association, the National Commission Against Drunk Driving, and http://www.webMD.com.