Metro line crossing over k-curve to right from corner 1, all in tunnel
<a href="//commons.wikimedia.org/wiki/User:AlgaeGraphix" title="User:AlgaeGraphix">AlgaeGraphix</a>
2019-12-28
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>