A rail clip sits on a concrete mount on the track in a tunnel near Whitechapel station during an event to celebrate the completion of the permanent track on the Elizabeth line in London, U.K., on Thursday, Sept. 14, 2017. Crossrail, which will be known as the Elizabeth Line once its up and running, hasnt yet set fares, but transit agency Transport for London has indicated they will be significantly less than Heathrow Express with a charging structure more akin to the Tube. Photographer: Chris Ratcliffe/Bloomberg via Getty Images