What term describes the total duration allocated to a signal phase?

The correct term that describes the total duration allocated to a signal phase is split. Split refers specifically to the distribution of green time between conflicting movements at an intersection. It defines how much time is given to each phase (i.e., green, yellow, and red), ensuring that traffic can flow safely and effectively.

The concept of split is crucial in traffic signal timing because it influences traffic efficiency and safety. Properly allocated splits can minimize delays, reduce congestion, and enhance the overall functioning of the signalized intersection. Understanding this term is essential for traffic signal technicians when configuring and optimizing signal timings.

In contrast, the other terms do not accurately capture the essence of a signal phase's duration. For instance, duration can refer to the length of time any signal state lasts but doesn't specifically denote the allocation among multiple phases. Cycle time encompasses the entire sequence of all phases in a traffic signal timing plan, rather than focusing exclusively on one phase. Phase time typically refers to how long a signal remains in a particular state but does not account for the broader distribution of time across multiple phases, which is what split does.