Which of the following is an appropriate use of your horn?

• A. To greet a friend in another car
• B. To warn others or for safety
• C. To express anger
• D. To signal a lane change

Answer: (B)

The horn is a warning device used to alert others to your presence or to a potential hazard so they can take action to avoid a collision. That makes warning others or signaling safety the appropriate use. Using the horn to greet a friend or to express anger isn’t about preventing danger and can distract or annoy other drivers. Signaling a lane change should be done with your turn signal, not the horn. A quick, brief honk may be used to warn of danger, but it’s not for communication or venting emotions.