Under the pressure of rapid economic development and insufficient road construction, the urban traffic burden becomes increasingly heavier. Under the existing resource conditions, how to improve the utilization efficiency and traffic efficiency of roads is an important way to alleviate traffic problems. In this study, with an intelligent signal intersection based on a traffic flow control subsystem as the goal, we firstly analyze the related algorithms of the traffic control system and the present situation of the information system. Based on the existing system, we design the architecture of the traffic control system, comprising the intersection subsystem, regional center, as well as information and control center. The intersection subsystem realizes the real-time acquisition of traffic flow data and the local intelligent control of the intersection. The detection scheme of the intersection subsystem is designed and implemented. The data acquisition and local intelligent control of the intersection subsystem are the keys to cloud data storage and real-time release from the traffic information platform, and it is of great significance to the coordinated control of multiple intersections.