is it illegal to honk your horn in australia

Short answer: yes—if you’re honking for anything other than warning others of your presence or a danger, it’s illegal across Australia.

The road rules only allow the horn to be used to warn of danger or your approach, not to say g’day, vent road rage, or celebrate a goal. Fines apply and the specifics vary by state and territory, so your “toot for the bride” can cost more than the confetti. Quick caveat: brief chirps from a factory alarm/lock system are generally permitted. Use it when it counts, keep it quiet otherwise, and everyone’s eardrums—especially yours—will thank you.