I think it&#x27;s okay for the second or third or even tenth largest project to be called &quot;one of the world&#x27;s largest projects&quot;.<p>FWIW, Crossrail is on this list of the 25 &quot;most impressive&quot; projects - <a href="http:&#x2F;&#x2F;www.popularmechanics.com&#x2F;technology&#x2F;g2121&#x2F;the-worlds-25-most-impressive-megaprojects&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.popularmechanics.com&#x2F;technology&#x2F;g2121&#x2F;the-worlds-...</a> .<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;List_of_transport_megaprojects" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;List_of_transport_megaprojects</a> describes it as a &quot;megaproject&quot;, and I can agree that everything which is a megaproject is one of the largest construction projects in the world.<p>Looking at the list of projects which are &quot;under construction&quot;, and ordered by cost, Crossrail is #6 at US$25B and the GBT is #10 at US$10B.