In terms of nonverbal cues, what might a stern face communicate to a driver?

A stern face is a powerful nonverbal cue that conveys authority and seriousness. This facial expression can communicate to a driver that the situation is being taken seriously and that the officer is in control of the interaction. When an officer presents a stern demeanor, it can establish an environment where compliance is expected. The seriousness in the officer's expression may prompt the driver to recognize the gravity of the situation, leading them to respond more appropriately to the encounter, whether it be acknowledging the violation or displaying a willingness to cooperate.

In traffic enforcement, conveying authority through nonverbal communication, such as a stern face, can be crucial. It can help maintain order during the stop and reinforce the officer's role in enforcing the law. This nonverbal expression serves to set the tone for the interaction and can significantly influence how the driver perceives the situation and their own behavior in response.