The registration number of a vehicle has consideration of personal datum in so far as this information can be associated with a physical person and, therefore, make her identifiable without requiring disproportionate efforts. The installation of several cameras in the Catalan road network to pick up this datum with preventive purposes and of management of the risk that it can be derived of the freight transport dangerous it will have to fulfill the forecasts of the Instruction 1/2009. Its treatment only him legitimate considerará when it takes place for the exercise of the functions typical of the administration consulting in the area of its competences, in this case, the exercise of competences on the subject of civil protection.