&gt;But execution and legislation are two separate branches,<p>And cars don&#x27;t drive themselves. So I guess that solves our problem.<p>You can read my post below (<a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10154344" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10154344</a>) to see how I&#x27;d start addressing your other concerns. Basically, if an enforcement officer recognizes some new variables, they can write them down in the law and then enforce it.