Controllers typically have what two types of ring operation?

Controllers in traffic signal systems typically have two types of ring operations known as single and dual. The single ring operation involves a straightforward sequence of signals that controls traffic flow at an intersection, generally focusing on one specific traffic movement or phase. This setup is simpler and often used in less complex signalized intersections.

Dual ring operation, on the other hand, is designed for more complex traffic situations where there are multiple phases and traffic movements that need to be coordinated effectively. This allows for more sophisticated management of traffic flows, accommodating the needs of various directions while minimizing delays and maximizing safety.

Understanding the distinction between single and dual ring operations is essential for traffic signal technicians, as it informs the choices they make when programming and adjusting controllers to ensure optimal traffic management.