Method of Evaluation and improvement of behavior of a vehicle driver and device for this purpose.

A method of evaluating the performance of the vehicle operator, the method including the steps of: receiving vehicle operating data from the vehicle relating to the operating condition of the vehicle; monitoring an interior portion of the vehicle and receiving the interior portion of the vehicle operator activity data (118) relating to activities of the operator (108) within the interior portion; receiving vehicle environment external to the vehicle environment data; and monitoring the vehicle operator (108) and receiving operator condition data (116) concerning a status of the vehicle operator (108); characterized by: estimating a cognitive load of the vehicle operator (108); and determining an evaluation value operator where the evaluation value operator based on operational data of the vehicle, the data operator activity (118), the environment data, the cognitive load of the vehicle operator and data operator status (116) and is indicative of vehicle operator performance.