What does a green interval in traffic control signals indicate?

A green interval in traffic control signals indicates that the right of way is granted to vehicles. This phase allows vehicles to proceed through an intersection or along a roadway and signals drivers that it is safe to move forward. The green light ensures that vehicles can advance while those facing a red light must stop, thus regulating the flow of traffic to maintain safety and order.

During this interval, traffic engineers design the signal operation to manage the time when vehicles can legally travel, which is crucial for efficient traffic management. Other phases of the signal, like the yellow or red, signify different actions, such as preparing to stop or that vehicles must come to a complete halt. Therefore, understanding the implications of a green light is key to ensuring smooth traffic flow and safety at intersections.

Pedestrian phases, emergency vehicle considerations, and controller reset periods, while important in traffic signal management, do not pertain to the indication of a green light in the context of vehicle movement.