Speed enforced by radar - why the extra verbiage
<p>Jurisdiction NYC.
Sample speed limit sign.</p>
<pre><code>+-------------+
|             |
| Speed Limit |
|      NN     |
|             |
| Enforced by |
|    radar    |
+-------------+
</code></pre>
<ul>
<li>Why must the authority specify &quot;enforced by radar&quot;?</li>
<li>What if they did not include this information?</li>
</ul>

<p><a href="/questions/tagged/united-states" class="post-tag" title="show questions tagged &#39;united-states&#39;" rel="tag">united-states</a></p>
<p>Speed limits can be enforced by any means (except photo-radar) in most U.S. jurisdictions without notice that it is being used. Those laws are close to being uniform in the U.S. due to federal coordination on federally funded roads, even though state and local laws are what governs them directly.</p>
<p>Some U.S. jurisdictions prohibit the issuance of photo-radar speeding tickets without notice before entering the photo-radar picture taking zone. I'd have to research further to see if New York City does.</p>
<p>The purpose of the language on the sign is to make drivers more fearful of being caught in circumstances where they don't see someone trying to enforce the law, not to have greater legal effect.</p>

traffic new-york-city law-enforcement