In China, the increasing traffic pressure has created traffic policing problems such as the heavy workloads of traffic police, as well as more conflicts between traffic police and road users. The treatment of traffic policing as a semiotic practice provides both a new perspective in and a helpful approach to dealing with these problems, yet few studies have investigated how semiotic resources are used in traffic policing interactions. This article examines the supportive role of semiotic resources in traffic policing, and (...) draws upon genre and exchanges involved as an illustration. The data include three audio recordings of traffic accident handling cases in Shanghai, China. Through qualitative analysis of the data from the perspective of Systemic Functional Linguistics, this article identifies the genre stages in traffic accident handling and their logico-semantic relations, and situates the typical exchanges and moves used by traffic police in different stages. It also discusses the usefulness of semiotic resources for traffic policing and the implications of these resources in tackling the existing problems of traffic policing in China. (shrink)