What does a red arrow at an intersection signify?

Answer: B — Turning traffic must stop

A red arrow at an intersection signifies that turning traffic must stop. This means that if a driver encounters a red arrow pointing in the direction they wish to turn, they are legally required to come to a complete stop and may not proceed in that direction until the light changes to green or the arrow allows for turning. This traffic signal is meant to enhance safety by controlling the flow of turning vehicles and ensuring they do not enter the intersection when it is unsafe to do so. This rule prevents potential accidents by ensuring that oncoming traffic or pedestrians have the right of way while the red arrow is displayed. Understanding the meaning of the red arrow is crucial for safe driving practices at intersections, as obeying this signal helps maintain order and prevent collisions with other vehicles or pedestrians.