How to use the vehicle horn to communicate?
<p>I know people use the car horn to get the attention of another drivers or pedestrians. </p>

<p>What other ways do people use the horn to communicate that may not be the same everywhere? Can you break any laws for using an automobile horn irregularly?</p>

<h2>Yes, you can be fined for improper use of the horn</h2>
<p>From the <a href="https://www.google.com.au/search?q=nsw%20road%20rules%20horn&amp;ie=UTF-8&amp;oe=UTF-8&amp;hl=en-au&amp;client=safari" rel="nofollow noreferrer">NSW Road Rules</a> there are only three permitted uses:</p>
<ul>
<li>warning other road users</li>
<li>moving animals off the road</li>
<li>as part of a theft alarm or breathalyzer interlock</li>
</ul>

<p>In the UK car horn use is restricted as per <a href="http://www.highwaycode.info/rule/112" rel="nofollow noreferrer">Rule 112</a> of the Highway Code as follows:</p>
<blockquote>
<p><strong>The horn.</strong> Use only while your vehicle is moving and you need to warn other road users of your presence. Never sound your horn aggressively. You <strong>MUST NOT</strong> use your horn</p>
<p>while stationary on the road
when driving in a built-up area between the hours of 11.30 pm and 7.00 am
<strong>except</strong> when another road user poses a danger.</p>
</blockquote>
<p>the use of &quot;MUST NOT&quot; in the above rule indicates that this is a legal requirement - in this case the legal basis is <a href="http://www.legislation.gov.uk/uksi/1986/1078/regulation/99/made" rel="nofollow noreferrer"><em>The Road Vehicles (Construction and Use) Regulations 1986</em> reg 99</a>.</p>

traffic vehicle regulations noise