Road traffic signals,asa common means of road traffic law enforcement,are directly related to the rule of law in traffic law enforcement and the protection of the rights of road users.Road traffic signals have given rise to a number of disputes,the most important of which lies in the definition of the legal nature of road traffic signals.In this regard,a typological approach should be adopted.The non-binding directive and warning road traffic signals can be defined as an administrative factual act;the normative prohibitive and mandatory signals can be defined as an abstract administrative act because its target individuals and matters are not specific.From the point of view of the main body of road traffic signals-grassroots law enforcement traffic police department,prohibitive and mandatory signals are equivalent in nature to normative documents.However,such a definition is also confronted with the test of the procedure for the formulation of normative documents,their forms and the principle of legal reservation.In this regard,the difficulties can be resolved in terms of the convenience of administrative enforcement and the restatement of legal norms.