<p>Quakers Yard viaduct being doubled in width to accomodate a double track. The line was originally single track. Beyond is a tunnel which was replaced by a deep cutting seen under constrction. The line was kept open to traffic during the remodelling!
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This line still in use between Cardiff and Merthyr, although now single track again.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/45767493@N00">Ben Salter</a> from Wales
CC BY 2.0
<p><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/ben_salter/3097226139/">Quakers Yard</a>
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<ul><li>Uploaded by <a href="//commons.wikimedia.org/wiki/User:Oxyman" title="User:Oxyman">Oxyman</a></li></ul>