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Can a car horn be too loud?

Subhead
Ask A Trooper
Lead Summary
By
Sgt. Troy Christianson, Minnesota Highway Patrol

Question: I noticed that the horn on my vehicle does not work. Is there a law that that says a vehicle must have a working horn and when it can be used? 
Answer: According to state law, your vehicle must have a horn that’s “in good working order and capable of emitting sound audible under normal conditions from a distance of not less than 200 feet. The horn or other warning device must not emit an unreasonably loud or harsh sound or a whistle.” I believe the definition of whistle is quite clear, and use common sense to determine if a horn is unreasonably loud or harsh. If it’s too loud or harsh, it could violate a local noise ordinance.
Minnesota law says it’s legal to honk a horn when it’s “reasonably necessary to insure safe operation” on the road. For example, that’d include warning other vehicles, pedestrians or animals as needed to avoid a crash.
If it’s not a safety situation, it’s illegal to honk the horn on the road. Excessive or illegal use of the horn could result in a road rage scenario, so only use it when needed for safety.
You can avoid a ticket — and a crash — if you simply buckle up, drive at safe speeds, pay attention and always drive sober.  Help us drive Minnesota Toward Zero Deaths.
If you have any questions concerning traffic-related laws or issues in Minnesota, send your questions to Sgt. Troy Christianson – Minnesota State Patrol at 2900 48th Street NW, Rochester MN 55901-5848.  (Or reach him at, Troy.Christianson@state.mn.us)

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