The continuous expansion of unconventional resource exploitation is often accompanied by the threat of induced seismicity,where fluid extraction and injection involved with industrial activities like shale gas exploitation,mining and CO₂ storage have all led to unexpected earthquakes around the world. Regulation of such anthropogenic seismic events lead to the establishments of traffic light system in various regions,in which as a near real-time response,the system often demands reduction or shut down of industrial activities,aiming to minimize the potential seismic hazard and risk after the occurrence of certain magnitude earthquakes. In this paper,we review the traffic light systems in the world by revisiting their development history,regulation principles and application outcomes. Overall,the development of traffic light system should integrate parameters such as magnitude,vibration intensity,b-value and fault distribution,as well as social factors like building structure,urban distance,population density and public response. In areas where unexpected earthquakes are frequently induced,dedicated dense seismic monitoring network should be deployed to enhance microseismic detection and location,whereas the state-of-the-art methods(i.e.,template matching,artificial intelligence)should be adopted to provide timely catalogs that reflects detailed spatial-temporal evolution of microseismic,serving for time-sensitive traffic light systems.