When driving, you only go through a traffic signal when it is green, not when it's red. The color of the light is BEST described as serving as a(n):

Question

Quizplus · Accepted Answer

A discriminative stimulus signals the availability of reinforcement or punishment following a certain behavior. In this case, the green light indicates that it is safe and acceptable (reinforcement available) to proceed through the intersection, while a red light would indicate the opposite.

When Driving, You Only Go Through a Traffic Signal When