Development of a Smart Traffic Light Control System With Real-Time Monitoring

From its emergence to the present day, traffic light control systems have been widely used to monitor and control the flow of vehicles. However, with the increasing number of public (bus) and private vehicles (car, motorcycle, and truck), urban centers are becoming more and more populous. Such phenomenon leads to traffic congestion and increases environmental and noise pollution. In order to stem the rise of such problems, large cities are adopting technological solutions, materializing the concept of smart cities. While observing traffic management systems themselves, several hardware and software solutions have been studied and implemented around the world. This article aims to contribute to traffic signals improvement by developing a centralized traffic light control system, using a unique wireless communication network. In order to prove the system's effectiveness, the most common types of urban intersections were analyzed. Direct control routines were implemented for network traffic lights, providing a complete control system for extraordinary events, such as closing roads due to accidents or public events. Finally, safety routines were formulated to report the operating status of the traffic light system lamps to a central management. With the aid of a logic analyzer connected to the outputs for each focal group, it was possible to set up an operating stages timing diagram of each traffic light. Thus, the system validation was achieved based on theoretical and practical timing diagrams similarities.