Track with tunnel straight with 1st and 2nd corners, set "u"
<a href="//commons.wikimedia.org/w/index.php?title=User:Puraki&amp;action=edit&amp;redlink=1" class="new" title="User:Puraki (page does not exist)">Puraki</a>
<a href="//commons.wikimedia.org/wiki/File:BSicon_utSTR.svg" title="File:BSicon utSTR.svg">BSicon utSTR.svg</a>; <a href="//commons.wikimedia.org/wiki/File:BSicon_utSTRc12.svg" title="File:BSicon utSTRc12.svg">BSicon utSTRc12.svg</a>