Treatment of convicted drinking drivers normally emphasizes modifying drinking behavior. The type and duration of treatment depend on factors such as the severity of the person’s drinking problem and DUI history. DUI offenders with less severe drinking problems benefit most from educational programs, although no known model is thought to be most effective in reducing recidivism or alcohol-related crashes. For repeat offenders or those with more seve re drinking problems, therapy that lasts for at least 12 months and that includes intensive programs focused on the individual appears to be most effective.