DOT supervisor training will train supervisors to become more aware of tolerance levels of alcoholism and drug addiction. One of the dangers of increasing tolerance of alcohol is consuming too much because the person does not feel alcohol's effects. When in social environments, others may urge this individual to do the driving because they're the one that "looks fine" at the end of the party. However, because of high tolerance, the individual could be the one with the higher blood alcohol content. Employees with high tolerance may think they are "lucky" for being "efficient drinkers" but eventually may unwillingly continue with this pattern for years as dependency and denial become increasingly severe which will effect both personal life and the workplace.