Gotthard base tunnel: 4 million man hours <a href="http:&#x2F;&#x2F;edition.cnn.com&#x2F;2011&#x2F;WORLD&#x2F;europe&#x2F;11&#x2F;23&#x2F;gotthard.base.tunnel&#x2F;" rel="nofollow">http:&#x2F;&#x2F;edition.cnn.com&#x2F;2011&#x2F;WORLD&#x2F;europe&#x2F;11&#x2F;23&#x2F;gotthard.base...</a><p>Crossrail: 20 million man hours three years ago <a href="http:&#x2F;&#x2F;m.londonlovesbusiness.com&#x2F;business-news&#x2F;london-transport&#x2F;stunning-crossrail-london-images-revealed&#x2F;4356.article" rel="nofollow">http:&#x2F;&#x2F;m.londonlovesbusiness.com&#x2F;business-news&#x2F;london-transp...</a><p>I&#x27;d love to see some more reliable figures, though.