What does the term "split" relate to in traffic signal timing?

The term "split" in traffic signal timing specifically refers to the allocation of green and red light times for different movements or phases within a traffic signal cycle. It indicates how the overall cycle length is divided among various phases for vehicles and pedestrians. Thus, knowing the split helps traffic engineers design signal timing plans that accommodate the demand for street crossings and vehicle movements.

This understanding is essential for creating efficient traffic flows, as it directly influences how long each phase will be active during a complete signal cycle. The split is a crucial factor in optimizing traffic signal performance to ensure safety and minimize congestion. In contrast to other answer choices, which touch on related concepts, the core nature of "split" directly pertains to the green and red light time distribution, making it vital for signal timing and control.