A circular green traffic light means which of the following?

A circular green traffic light indicates that drivers may proceed through the intersection. This means that you are permitted to go straight ahead or make turns unless there are specific signs that prohibit such actions. This flexibility is essential for facilitating traffic flow and allowing drivers to navigate intersections according to their intended routes.

In addition, when you encounter a green light, traffic and pedestrians that are already in the intersection must yield to you. This rule is in place to ensure safety and minimize the chances of collisions as vehicles pass through. Therefore, both provisions regarding movement and yielding to existing traffic are true when a green light is displayed.