With support from TrygFonden, DTU Transport has performed a study on distracted driving. The study consisted of partly a literature study and partly an experimental study carried out in DTU Transport's car driving simulator. The purpose of the literature study was to establish an overview of the existing research-based knowledge about distracted driving. The purpose of the simulator study was to contribute with new knowledge within relevant areas identified by means of the literature study. A prerequisite for safe driving is that the driver pays attention to the traffic. Nonetheless, practically all drivers carry out different activities while driving, activities which are not necessary for the driving itself, e.g. chatting with passengers and eating and drinking. It is estimated that the drivers are engaged in different kinds of distracting activities during approximately 30 % of the time the car is moving. The distractions impair the driver's attention on the traffic. In this way the risk of overlooking another road user, reacting too late or inadequately and of getting involved in an accident is increased. However, studies indicate that distraction from within the cabin is a decisive factor in approximately 30 % of all road accidents.