Study examined data from students reporting driving within one hour of drinking two or more drinks. Three-cluster typology included: Marginals engage in least amount of delinquent behaviors, alcohol use, and drinking-driving; Heavy Drinkers are heaviest drinkers, most frequent drinking-drivers, and have greatest driving exposure; Delinquents exhibit most delinquency, have least driving exposure, and greatest experience of accidents and drinking-driving consequences. (Contains 33 references, 2 tables, and 1 figure.) (ADT)