When discussing signal phases, what does 'green time' refer to?

'Green time' specifically refers to the duration during which a traffic signal displays a green light for vehicles. This period is crucial because it determines how long vehicles can safely travel through the intersection. Proper management of green time is necessary to optimize traffic flow and ensure that the intersection functions efficiently.

In contrast, the other options describe different aspects of traffic signals. The time allocated for vehicles to stop is associated with the red light, which instructs vehicles to halt. The time before the yellow light appears pertains to the transition between the green and red phases, which is not what 'green time' signifies. Finally, the total cycle of a traffic signal encompasses the entire sequence of phases (green, yellow, red), which includes more than just the green phase itself. Understanding these distinctions provides a clearer understanding of traffic signal operations and their timings.