What does a red arrow traffic signal mean?

A red arrow traffic signal indicates that a driver must come to a complete stop and wait for the light to change to a green arrow before proceeding. This signal is specifically designed to control turns, and the red arrow means that turning in the direction indicated is prohibited until the signal changes. It emphasizes the need for caution and safety, as allowing drivers to turn on a red arrow could result in accidents at intersections where oncoming traffic or pedestrians may have the right of way. Thus, it's crucial for drivers to wait for the green arrow to ensure it is safe to proceed with their turn.