Track switch in tunnel
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edited <a href="//commons.wikimedia.org/wiki/File:BSicon_t%C3%9CST.svg" class="image"><img alt="BSicon tÜST.svg" src="https://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/BSicon_t%C3%9CST.svg/180px-BSicon_t%C3%9CST.svg.png" decoding="async" width="180" height="180" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/BSicon_t%C3%9CST.svg/270px-BSicon_t%C3%9CST.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/BSicon_t%C3%9CST.svg/360px-BSicon_t%C3%9CST.svg.png 2x" data-file-width="500" data-file-height="500"></a> colours