What does a green arrow and a red light at an intersection mean?

A green arrow combined with a red light indicates that vehicles may proceed in the direction of the green arrow while other traffic must stop. This signaling allows vehicles to make a turn in the direction of the arrow even when the light is red for other lanes, ensuring that the turning traffic has the right of way. It's crucial for drivers to be aware of the specific traffic conditions and commands provided by signals, as the green arrow signifies a safe and permitted movement for turning, while the red light indicates that other traffic should be halted. Understanding this can enhance both safety and traffic flow at intersections.