What type of technology is commonly used in modern traffic signal control systems?

Digital signal processing is widely used in modern traffic signal control systems due to its ability to process and analyze signals efficiently and accurately. This technology allows for the manipulation of traffic data in real-time, facilitating complex algorithms that improve traffic management, reduce congestion, and enhance safety at intersections. By leveraging digital methods, systems can respond more quickly to changing traffic patterns and incorporate inputs from various sensors and communication technologies, such as inductive loops, cameras, and vehicle detection systems.

In addition, digital signal processing enables better storage, retrieval, and sharing of data which can contribute to more effective decision-making and reporting regarding traffic flow. As cities become smarter, the demand for real-time analysis and automated controls necessitates the use of digital over analog systems, which were more limited in their capabilities.