Crossrail is at 100 million working hours so far, with 10,000 people working across over 40 construction sites, according to <a href="http:&#x2F;&#x2F;www.crossrail.co.uk&#x2F;news&#x2F;crossrail-in-numbers" rel="nofollow">http:&#x2F;&#x2F;www.crossrail.co.uk&#x2F;news&#x2F;crossrail-in-numbers</a> (which also describes it as &quot;Europe&#x27;s largest construction project&quot;).