What does a green light indicate at an intersection?

A green light at an intersection indicates that drivers may proceed through the intersection, provided it is safe to do so. This means that when the light turns green, drivers should check the intersection for any potential hazards, such as pedestrians crossing or vehicles that may not have stopped at a red light. The emphasis on proceeding with caution is crucial; even though the green light allows movement, it doesn't guarantee that the intersection is completely clear or free of obstacles.

While the other options suggest actions that might pertain to different signaling situations, they do not align with the meaning of a green light. For instance, stopping and waiting is required for red lights, slowing down immediately is not recommended unless there is a clear reason to do so, and yielding to oncoming traffic typically applies when making left turns at intersections, not when facing a green light. Hence, the proper response to a green light is to proceed with caution, ensuring that the intersection is clear before moving forward.