It is illegal to yell profanities at a police officer who is directing traffic.

The Law Explained

While generally protected by the First Amendment today, historic disorderly conduct codes in Jonesboro made it specifically illegal to curse at an officer performing traffic duties. The law was designed to maintain order at busy intersections and ensure that frustrated drivers didn't distract law enforcement. Shouting an expletive over a traffic jam historically counted as breaching the peace.