What device is commonly used in closed loop systems to control local intersections?

In closed loop traffic signal systems, a key component for controlling local intersections is the fiber optics transmitter. This device enables the transmission of real-time data regarding traffic flow and signal status amongst various signals within a network. Fiber optics are utilized due to their capacity for high-speed data transmission and large bandwidth, ensuring that information can be communicated effectively across multiple intersections without significant delays.

Closed loop systems rely on consistent and timely data to adjust signal timings based on traffic conditions, thereby improving traffic flow and minimizing congestion. By using fiber optics, the system can maintain high levels of communication integrity and reliability, essential for optimal operation at intersections. Other technologies, such as Wi-Fi routers and satellite dishes, may serve specific purposes in different contexts, but they are not designed specifically for traffic control in the same way that fiber optics are implemented within closed loop systems. Similarly, dial-up modems do not provide the necessary speed and reliability for modern traffic management needs.