Differentiating risky and aggressive driving: Further support of the internal validity of the Dula Dangerous Driving Index

► We validated a French version of the Dula Dangerous Driving Index (DDDI). ► The instrument presents a good internal consistency. ► Results support the theoretical structure and the validity of the DDDI. ► Risky and aggressive driving are associated with different psychological correlates. ► The study underscores the importance of differentiating risky and aggressive driving.