© Crossrail Ltd
London's Crossrail project is now more than 70% complete after construction began in 2009.
The underground railway network will make getting around the city much faster and easier by reducing crowds on existing rail services, like the London Underground and National Rail.
Crossrail estimates the first services will begin in mid-2018, with the rest being opened in phases until December 2019.
So far, over 10 kilometres (6 miles) of new track has been installed according to a project overview, and at some stations, work is close to being finished.
Check out the latest images of the work that's being done to the multi-billion pound project.