What does a green arrow in a traffic light signify?

A green arrow in a traffic light signifies that you may proceed in the direction of the arrow. This indicates that it is safe to move in that direction and that you have the right of way over other vehicles and pedestrians. The presence of the green arrow means that traffic in that lane or direction is allowed to go, and it clearly directs drivers to follow that path.

In contrast, other signals such as red lights require stopping, while yellow lights indicate caution and the need to prepare to stop if it is safe to do so. Additionally, a yield sign reminds drivers to give way to oncoming traffic or pedestrians, which is not applicable when a green arrow is displayed. Thus, the green arrow provides clear permission to proceed safely, making it an important traffic control signal for both safety and efficiency on the road.