Introduction: Positive driver behaviors—including smooth and proactive mobility, environmentally sustainable practices, and risk communication—play a crucial role in fostering safer and more responsible traffic environments. However, the extent to which these behaviors are influenced by stable personality traits versus learnable driver competencies remains insufficiently understood. Purpose: This study examined the relative predictive power of personality and driver skills across three dimensions of positive driver behavior. Method: A total of 525 licensed drivers (51% female; age range = 18-65) completed self-report measures, including the Basic Personality Traits Inventory (BPTI), the Driver Skills Inventory (DSI), and the three subscales of the Multidimensional Positive Driver Behavior Questionnaire (M-PDBQ): Smooth and Proactive Mobility (SPM), Environmentally Sustainable Behaviors (ESB), and Risk Communication (RC). For each outcome, hierarchical regression analyses were conducted in three steps: (1) demographic variables such as age, gender, annual mileage (2) personality traits, and (3) driver skills. Result: Results showed that personality traits significantly predicted all three types of positive driver behaviors (ΔR² = .204 for SPM, .111 for ESB, and .173 for RC; all ps < .001), underscoring the role of individual dispositions. Notably, driver skills explained additional variance beyond personality traits (ΔR² = .178 for SPM, .043 for ESB, and .062 for RC; all ps < .001), indicating that these behaviors are not entirely fixed but can be modified through training and experience. Conclusion: In conclusion, while positive driver behaviors are partly rooted in personality, they are also meaningfully associated with competencies that can be developed. These findings suggest that targeted driver education programs focusing on hazard anticipation, self-regulation, and eco-driving may effectively enhance prosocial and responsible driving across multiple behavioral domains.