Metro line crossing over k-curve from left to corner 4, all in tunnel
<a href="//commons.wikimedia.org/wiki/User:Oahiyeel" title="User:Oahiyeel">Oahiyeel</a>
2021-07-15
derived from <a href="//commons.wikimedia.org/wiki/File:BSicon_tkKRZr%2B1to.svg" title="File:BSicon tkKRZr+1to.svg">File:BSicon tkKRZr+1to.svg</a>