This study investigated the relation between overall aggressive personality type (APT) and aggressive driving behaviors (ADB), as well as the effects of driver anonymity (defined by driving alone vs. driving with a passenger[s]) on ADB scores. Forty undergraduate college students (17 men, 23 women) with a mean age of 19.73 years completed the Aggression Questionnaire (Buss & Perry, 1992) and an aggressive driving questionnaire composed by the researcher. The results revealed a statistically significant correlation between APT and ADB for both the driving alone, r = .440, p < .01, and driving with passenger(s), r = .456, p < .01, conditions. There was also a significant difference in driver aggression scores for drivers alone versus drivers with a passenger(s). These results suggest a need for driver training programs to implement anger/hostility management components.