This exists in SF, it&#x27;s called called &quot;Pit Stop SF&quot;: <a href="http:&#x2F;&#x2F;sfdpw.org&#x2F;index.aspx?page=1805" rel="nofollow">http:&#x2F;&#x2F;sfdpw.org&#x2F;index.aspx?page=1805</a> and costs over $1mm a year according to the Chron: <a href="http:&#x2F;&#x2F;www.sfchronicle.com&#x2F;bayarea&#x2F;matier-ross&#x2F;article&#x2F;City-s-latrine-team-tries-to-keep-public-6479253.php" rel="nofollow">http:&#x2F;&#x2F;www.sfchronicle.com&#x2F;bayarea&#x2F;matier-ross&#x2F;article&#x2F;City-...</a>