What does the angle of an officer's arm typically indicate when signaling?

The angle of an officer's arm when signaling is primarily used to convey direction for turning or stopping. When an officer raises their arm horizontally, it usually indicates that drivers should come to a complete stop. If the officer extends their arm at a 90-degree angle, it signifies a turn—left if the arm is extended to the left and right if extended to the right. This clear and consistent use of arm signals ensures that drivers understand the intended actions they need to take, promoting safety and effective traffic management.

The other options do not accurately represent the purpose of arm signals. For instance, the presence of an officer's arm signaling does not indicate the number of cars allowed to pass, nor does it convey speed limits or identify specific types of approaching vehicles. The primary function is to guide the flow of traffic through clear and recognizable hand gestures.